phfextendedabstract (11oct21)

git-svn-id: svn://tug.org/texlive/trunk@60732 c570f23f-e606-0410-a88d-b1316a301751

4 files changed, 1392 insertions, 0 deletions

diff --git a/Master/texmf-dist/source/latex/phfextendedabstract/Makefile b/Master/texmf-dist/source/latex/phfextendedabstract/Makefile
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@@ -0,0 +1,11 @@
+
+PKG = phfextendedabstract
+PKGSTYEXT = cls
+
+-include pkg.mk
+
+pkg.mk:
+	ln -sf ../mkcommon/pkg.mk pkg.mk
+
+install:  install_cls install_doc
+
diff --git a/Master/texmf-dist/source/latex/phfextendedabstract/phfextendedabstract.dtx b/Master/texmf-dist/source/latex/phfextendedabstract/phfextendedabstract.dtx
new file mode 100644
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+++ b/Master/texmf-dist/source/latex/phfextendedabstract/phfextendedabstract.dtx
@@ -0,0 +1,1138 @@
+% \iffalse meta-comment
+%
+% Copyright (C) 2021 by Philippe Faist <philippe.faist@bluewin.ch>
+% -------------------------------------------------------
+% 
+% This file may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3
+% of this license or (at your option) any later version.
+% The latest version of this license is in:
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% and version 1.3 or later is part of all distributions of LaTeX 
+% version 2005/12/01 or later.
+%
+% \fi
+%
+% \iffalse
+%<*driver>
+\ProvidesFile{phfextendedabstract.dtx}
+%</driver>
+%<package>\NeedsTeXFormat{LaTeX2e}[2005/12/01]
+%<package>\ProvidesClass{phfextendedabstract}
+%<*package>
+    [2021/09/08 v1.0 phfextendedabstract class]
+%</package>
+%
+%<*driver>
+\documentclass{ltxdoc}
+\usepackage{xcolor}
+\usepackage[preset=xpkgdoc]{phfnote}
+\usepackage{needspace}
+
+\makeatletter
+\newsavebox\phfeaDocVirtualPage@contents
+\newenvironment{phfeaDocVirtualPage}{%
+  \par%
+  \begingroup%
+  \makeatletter%
+  \begin{lrbox}{\phfeaDocVirtualPage@contents}%
+  \begin{minipage}{12cm}\relax%
+    \def\rmdefault{cmr}\def\sfdefault{cmbr}\normalfont%
+    \def\shortlipsum{Lorem ipsum dolor sit amet, consectetuer
+      adipiscing elit. Ut purus elit, vestibulum ut, placerat ac,
+      adipiscing vitae, felis. Curabitur dictum gravida
+      mauris. Nam arcu libero, nonummy eget, consectetuer id,
+      vulputate a, magna.}%
+    \let\RequirePackage\@gobble%
+    \def\morepagecontents{\par\vspace{1em}\centering\ldots}%
+    \ignorespaces%
+  }%
+  {%
+  \end{minipage}%
+  \end{lrbox}%
+  %%\centering%
+  \begin{tcolorbox}[text width=6cm,sharp corners,%
+    before={\par\vspace{5pt}\centering\nopagebreak\parindent=0pt},after={\par\vspace{5pt}},%
+    leftrule=0.4pt,toprule=0.4pt,rightrule=0.6pt,bottomrule=0.6pt,%
+    colframe=black,colback=white]%
+    \scalebox{0.5}{\usebox{\phfeaDocVirtualPage@contents}}%
+  \end{tcolorbox}%
+  %%\par%
+  \endgroup%
+}
+\def\phfeaSectionDecoration{% only for doc purposes
+  \raisebox{0.2ex}{{%
+      \notesmaller[0.4]\phfeaSectionDecorationSymbol}}%
+  \hspace*{1.5ex}%
+}
+\def\phfeaSectionDecorationSymbol{\ensuremath{\blacksquare}}% only for doc purposes
+\def\phfeaParagraphDecoration{% only for doc purposes
+  \raisebox{0.2ex}{{%
+      \notesmaller[0.6]\phfeaParagraphDecorationSymbol}}%
+  \hspace*{1ex}%
+}
+\def\phfeaParagraphDecorationSymbol{\ensuremath{\triangleright}}% only for doc purposes
+
+\def\eqsign@{=}
+\def\eqsign{\protect\eqsign@}
+\robustify\eqsign
+\makeatother
+
+\def\RevTeX{{\small R\raise-0.2ex\hbox{\textsc{ev}}}\TeX}
+
+\EnableCrossrefs         
+\CodelineIndex
+\RecordChanges
+\begin{document}
+  \DocInput{phfextendedabstract.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \CheckSum{0}
+%
+% \CharacterTable
+%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%   Digits        \0\1\2\3\4\5\6\7\8\9
+%   Exclamation   \!     Double quote  \"     Hash (number) \#
+%   Dollar        \$     Percent       \%     Ampersand     \&
+%   Acute accent  \'     Left paren    \(     Right paren   \)
+%   Asterisk      \*     Plus          \+     Comma         \,
+%   Minus         \-     Point         \.     Solidus       \/
+%   Colon         \:     Semicolon     \;     Less than     \<
+%   Equals        \=     Greater than  \>     Question mark \?
+%   Commercial at \@     Left bracket  \[     Backslash     \\
+%   Right bracket \]     Circumflex    \^     Underscore    \_
+%   Grave accent  \`     Left brace    \{     Vertical bar  \|
+%   Right brace   \}     Tilde         \~}
+%
+%
+% \changes{v1.0}{2021/07/29}{Initial version}
+%
+% \GetFileInfo{phfextendedabstract.dtx}
+%
+% \DoNotIndex{\newcommand,\newenvironment,\def,\gdef,\edef,\xdef,\if,\else,\fi,\ifx}
+% 
+% \title{\phfqitltxPkgTitle{phfextendedabstract}}
+% \author{Philippe Faist\quad\email{philippe.faist@bluewin.ch}}
+% \date{\pkgfmtdate\filedate}
+%
+% \maketitle
+%
+% \begin{abstract}
+%   \pkgname{phfextendedabstract}---Typeset extended abstracts for conferences,
+%   such as often encountered in quantum information theory.
+% \end{abstract}
+%
+% \inlinetoc
+%
+% \section{Introduction}
+%
+% Several conferences in Quantum Information Theory (and presumably in other
+% fields, too) require the submission of \emph{extended abstracts}.  An extended
+% abstract is a summary of a scientific result, presented at a high level, and
+% consisting of at most a small handful of pages.
+%
+% I found myself repeatedly copying my \LaTeX\ preamble from one submission to
+% another with definitions for a format that I elaborated and liked.  So at some
+% point I collected the main definitions into this class file.
+% 
+% The \pkgname{phfextendedabstract} class sets up the document for an extended
+% abstract submission as a single-column document, typeset by default at 11
+% point size, with at most two sectioning levels (|\section|\,s and
+% |\paragraph|\,s).  It is based on the \RevTeX\ class.
+%
+% The extended abstract style looks approximately like this:
+% \nopagebreak
+% \iffalse COMMENT: Spacings are copied/emulated ! They might appear wrong!! \fi
+% \begin{phfeaDocVirtualPage}
+%   {\parskip=8pt\relax
+%     {\sffamily\Large\centering Title of my extended abstract\par}
+%     {\centering Author One,\ \ Author Two,\ \  and\ \ Author Three\par}
+%   }\vspace{0.2cm}
+%   \parskip=3pt\relax
+%   
+%   \noindent{\normalfont\normalsize\sffamily\fontseries{sb}\selectfont
+%     \makebox[0pt][r]{\phfeaSectionDecoration}Introduction.}
+%   \shortlipsum
+%   
+%   \noindent{\normalfont\normalsize\sffamily\fontseries{sb}\selectfont
+%     \makebox[0pt][r]{\phfeaSectionDecoration}Results.}
+%   \shortlipsum
+%   
+%   \noindent{\normalfont\normalsize\sffamily\small
+%     \makebox[0pt][r]{\phfeaParagraphDecoration}First result.}
+%   \ldots
+%
+%   \noindent{\normalfont\normalsize\sffamily\small
+%     \makebox[0pt][r]{\phfeaParagraphDecoration}Second result.}
+%   \ldots
+%
+%   \noindent{\normalfont\normalsize\sffamily\fontseries{sb}\selectfont
+%     \makebox[0pt][r]{\phfeaSectionDecoration}Discussion.}
+%   \shortlipsum   
+%  \hspace*{1.5ex}%
+%
+% \end{phfeaDocVirtualPage}
+%
+%
+% \section{Main features}
+%
+% Here are the main features of the \pkgname{phfextendedabstract} class:
+% \begin{itemize}
+% \item The class \pkgname{phfextendedabstract} loads the \pkgname{revtex4-2}
+%   class, so you can directly use \RevTeX's features such as author
+%   affiliations, etc.
+%
+% \item Only two sectioning commands are enabled: |\section| and |\paragraph|.
+%   Both have run-in headings.  If you find yourself needing additional
+%   sectioning levels, it might be that your extended abstract is too detailed
+%   and you might want to think about how to keep it at a higher level.  It
+%   might also be that \pkgname{phfextendedabstract} is too limited for your
+%   needs.
+%
+%   By default, section and paragraphs have ``decorations'' (by default a symbol
+%   in the margin) to guide the reader through the overall high-level structure
+%   of the document.  (Disable them with the |noheadingdecorations| class
+%   option.)
+%
+% \item You can easily scale all vertical spacing dimensions (section and
+%   paragraph spacing, vertical space around theorems and list environments,
+%   etc.) by a common factor with a class option.  Do you have those extra two
+%   lines that make you exceed your 3-page limit?  Try squeezing everything
+%   together with a class option like |compressverticalspacing=0.7|.
+%
+% \item The \pkgname{phfnote} package is loaded in order to provide a set of
+%   default \LaTeX\ packages and set up hyperlinks.  A generous default set of
+%   standard LaTeX packages are loaded, including \pkgname{caption} and
+%   \pkgname{enumitem}; see \pkgname{phfnote}'s documentation for the option
+%   |pkgset=extended|.
+%
+%   \textbf{You are expected to include
+%   \phfverb{\usepackage}\phfverb{{hyperref}} somewhere in your preamble.}  We
+%   deliberately don't include \pkgname{hyperref} when loading the class in
+%   order to give you greater control of package loading order (most packages
+%   you might want to use must be loaded before \pkgname{hyperref}).
+%
+% \item The page margins are tweaked with the \pkgname{geometry} package.
+%   (Simply call |\geometry{...}| if you'd like to further change them.  Refer
+%   to the \pkgname{geometry} package's documentation.)
+%
+% \item Lists, i.e.\@ the |itemize| and |enumerate| environments, are customized
+%   using the \pkgname{enumitem} package so that they take up less space.  You
+%   also get a |enumerate*| environment that typesets its items in-line, in a
+%   single paragraph.
+%   
+%   (Note that this customization won't work if you choose to load a package set
+%   via a |pkgset=| option that doesn't include \pkgname{enumitem}.)
+%
+% \item By default we load the \pkgname{phfthm} package and set a customized
+%   theorem style so that it stands out but also so that it contrasts well with
+%   the section and paragraph headings.
+%
+% \end{itemize}
+%
+% Check out the class option documentation in \autoref{sec:class-options} to get
+% a better idea of how to customize \pkgname{phfextendedabstract}'s behavior!
+%
+%
+% \section{Example Usage}
+%
+% Here's a simple template:
+% \begin{verbatim}
+% \documentclass[papertype=a4paper]{phfextendedabstract}
+%
+% \usepackage{hyperref}
+%
+% \begin{document}
+% \title{Title goes here}
+% \author{Author 1}
+% \author{Author 2}
+% \maketitle
+% 
+% \section{Introduction.}
+% Lorem ipsum ...
+%
+% \section{Results.}
+% We had some cool results about
+% \begin{enumerate*} % inline enumeration
+% \item a first result,
+% \item a second result, % and
+% \item a final result.
+% \end{enumerate*}
+%
+% \paragraph{First result.}
+% Here's a first result ...
+%
+% \paragraph{Second result.}
+% Here's another result ...
+%
+% ...
+%
+% \end{document}
+% \end{verbatim}
+%
+% (Try it out!)
+%
+%
+% \section{Class options}
+% \label{sec:class-options}
+%
+% Here is a summary of class options:
+% \begin{pkgoptions}
+% \item[papertype=a4paper,letterpaper,\meta{paper type},\meta{empty}] Specify
+%   the paper type to use (A4 or letter).  The argument given to this option is
+%   directly specified as an option to the underlying \RevTeX\ class.
+% \item[ptsize=10pt,11pt,12pt] Default font size to use.  Again the argument
+%   given to this option is directly specified as an option to the underlying
+%   \RevTeX\ class.
+% \item[sectiondecorations=\meta{true or false}] Whether or not to ``decorate''
+%   section headings, by default with a small black square typeset in the margin
+%   of the section heading.
+% \item[paragraphdecorations=\meta{true or false}] Whether or not to
+%   ``decorate'' paragraph headings, by default with a small right-pointing
+%   outlined triangle typeset in the margin of the paragraph heading.
+% \item[noheadingdecorations] Shorthand for
+%   |sectiondecorations=false,paragraphdecorations=false|.
+% \item[compressverticalspacing=\meta{factor}] Real factor by which to multiply
+%   the vertical spacing between sections, paragraphs, theorems, paragraphs,
+%   list environments such as |itemize| and |enumerate|, etc.  If you need to
+%   compress the sections a bit to fit more content on a fixed number of pages
+%   (e.g.\@ because of page number constraints), you can set this option to a
+%   factor that's less than one.  A \meta{factor} that's less than one
+%   compresses sections together, a \meta{factor} equal to |1| does nothing, and
+%   a \meta{factor} greater than one expands the sections further apart.
+% \item[loadtheorems=\meta{true or false}] If |loadtheorems=true| (the default),
+%   then the \pkgname{phfthm} package is loaded with some suitable default
+%   options and a custom theorem style.  (The theorem style
+%   |phfextendedabstractthm| is defined regardless of this package option.)
+% \item[sansstyle=\meta{true or false}] Use sans serif style by default for the
+%   main title as well as for section and paragraph headings.  For greater
+%   degree of control, see \autoref{sec:customize-title-and-headings-style}.
+% \item[usehyperref=\meta{true or false}] Should we set up the document for use
+%   with the \pkgname{hyperref} package or not?  This option influences how we
+%   load the \pkgname{phfnote} package.  If this option is set to |true| (the
+%   default), then the \pkgname{phfnote} package is loaded with
+%   |hyperrefdefs={defer,noemail}|.  This means that the document is set up for
+%   use with \pkgname{hyperref}, although you will still need to say
+%   |\usepackage{hyperref}| somewhere in your preamble.  If |usehyperref=false|,
+%   then the \pkgname{phfnote} package is loaded with hyperref options disabled.
+%
+%   (The |noemail| option is specified to \pkgname{phfnote} to avoid
+%   interference with \RevTeX's own |\email| command used to specify email
+%   addresses for individual authors.)
+% \item[pkgset=\meta{\pkgname{phfnote} package set name}] The \pkgname{phfnote}
+%   package (which we load internally) loads a bunch of standard packages for
+%   your convenience, such as \pkgname{enumitem} or \pkgname{microtype}.  You
+%   can influence this behavior by specifying a ``package set'' to load.  By
+%   default, the |pkgset=extended| package set is loaded.  If you don't want to
+%   load any additional packages beyond those that are strictly necessary, use
+%   |pkgset=none| or |pkgset=minimal|.  See \pkgname{phfnote}'s documentation
+%   for the package option |pkgset=...| for more information and a list of
+%   possible package set names.
+% \end{pkgoptions}
+% 
+%
+% \section{Macros and environments}
+%
+% \subsection{Sections and paragraphs}
+%
+% \DescribeMacro{\section} \DescribeMacro{\paragraph} This class only provides
+% two sectioning levels: |\section| and |\paragraph|.  Both produce run-in
+% headings.
+%
+% By default, sections and paragraphs produce a small ``decoration'' in the left
+% margin, to guide the reader's eye through the document's high-level structure.
+%
+% You can disable/enable section and paragraph decorations with the
+% |sectiondecorations|, |paragraphdecorations| and |noheadingdecorations| class
+% options.
+%
+% The |\section| and |\paragraph| macros also accept a special syntax: If they
+% are immediately followed by an exclamation mark (|!|), then they do not
+% produce the corresponding decoration.  E.g.:
+% \begin{verbatim}
+% \section!{A section heading without its decoration}
+% \end{verbatim}
+%
+% Also, section and paragraphs will not produce any horizontal space if the
+% title is empty.  You can use this feature to produce the spacing and
+% decoration of a section, but not the heading:
+% \begin{verbatim}
+% \section{} This line has the vertical spacing and decoration
+% associated with a section, but with no run-in heading.
+%
+% \section!{} This line has the vertical spacing associated
+% with a section, but with no decoration or run-in heading.
+% \end{verbatim}
+%
+% You can also use the additional syntax |<|\emph{\ldots}|>| to specify a custom
+% decoration instead of the default one.  (But you should only use this
+% sparingly! Redefine |\phfeaSectionDecorationSymbol| if you want to change the
+% symbol for all sections!)  For instance:
+%
+% \begin{verbatim}
+% \section<\guilsinglright>{} \emph{Manuscript in preparation.}
+% \end{verbatim}
+%
+% Here's a summary of the argument structure for |\section| and |\paragraph|:
+%
+% |\section|{\large\textbar}|\paragraph|
+% \emph{[} |*| \emph{]} \emph{[} |!| \emph{]}
+% \emph{[} |<|\meta{decoration}|>| \emph{]}
+% \emph{[} \oarg{alt title} \emph{]}
+% \marg{title}
+% 
+% The optional star and optional alternative title are passed on to the standard
+% \LaTeX\ sectioning commands.  The alternative title is typically used for the
+% table of contents and for PDF bookmarks.
+%
+% \DescribeMacro{\phfeaSectionDecoration}
+% \DescribeMacro{\phfeaParagraphDecoration} You can use the
+% |\phfeaSectionDecoration{<symbol>}| and |\phfeaParagraphDecoration{<symbol>}|
+% to manually place a section or paragraph decoration at any place:
+% \begin{verbatim}
+% \phfeaSectionDecoration{$\to$} Check out our website at
+% \href{https://github.com/phfaist/phfqitltx}{github.com/phfaist/phfqitltx}
+% \end{verbatim}
+%
+% If the |sectiondecorations=false| class option was specified, the macro
+% |\phfeaSectionDecoration{...}| produces no output.  Similarly,
+% |\phfeaParagraphDecoration{...}| does nothing if |paragraphdecoration=false|
+% was specified.
+%
+% \DescribeMacro{\phfeaSectionDecorationSymbol}
+% \DescribeMacro{\phfeaParagraphDecorationSymbol}
+% The default section and paragraph symbols (including size and vertical
+% adjustments) are stored in the |\phfeaSectionDecorationSymbol| and
+% |\phfeaParagraphDecorationSymbol| macros.  You can redefine these macros to
+% set custom decoration symbols:
+% \begin{verbatim}
+% \renewcommand{\phfeaSectionDecorationSymbol}{\Large$\Rightarrow$}
+% \renewcommand{\phfeaParagraphDecorationSymbol}{\raisebox{1pt}{\tiny $>$}}
+% \end{verbatim}
+%
+% You can customize section and paragraph headings, including spacing and style,
+% by redefining the following macros.
+%
+% \DescribeMacro{\phfeaSectionBeforeSkip}
+% \DescribeMacro{\phfeaSectionAfterHSkip} The macro |\phfeaSectionBeforeSkip|
+% (it's a macro, not a length) is used to specify the vertical spacing before a
+% new section heading.  The macro (not length) |\phfeaSectionAfterHSkip| is the
+% horizontal space between the end of the section heading and the beginning of
+% the section text contents.  You can redefine these macros to set your custom
+% spacings.  (If you're looking to compress the vertical spacings to save on the
+% number of pages, look at the |compressverticalspacings=| class option and the
+% |\phfeaVerticalSpacingCompressionFactor| macro.)
+%
+% \DescribeMacro{\phfeaParagraphBeforeSkip}
+% \DescribeMacro{\phfeaParagraphAfterHSkip} The macros
+% |\phfeaParagraphBeforeSkip| and |\phfeaParagraphAfterHSkip| behave similarly
+% for paragraphs.
+%
+% \DescribeMacro{\phfeaSectionStyle} \DescribeMacro{\phfeaParagraphStyle} The
+% macros |\phfeaSectionStyle| and |\phfeaParagraphStyle| are used to set the
+% style of the section and paragraph headings.  By default, the default
+% sans/heading style is used at the normal size and in bold face series for
+% sections, and the normal sans style is used at a smaller size for paragraph
+% headings.
+%
+% \DescribeMacro{\phfeaSectionFormatHeading}
+% \DescribeMacro{\phfeaParagraphFormatHeading} The macros
+% |\phfeaSectionFormatHeading{...}| and |\phfeaParagraphFormatHeading{...}| can
+% be redefined to format the section and paragraph headings, respectively.  You
+% can redefine these macros to add punctuation, to capitalize the title, etc.
+% For instance:
+% \begin{verbatim}
+% \renewcommand\phfeaSectionFormatHeading[1]{\MakeUppercase{#1}\ ---}
+% \end{verbatim}
+%
+% The macros |\phfeaSectionFormatHeading{...}| and
+% |\phfeaParagraphFormatHeading{...}| are not called if the section/paragraph
+% title argument is empty.
+%
+%
+% \subsection{Vertical spacing}
+%
+% \DescribeMacro{\phfeaVerticalSpacingCompressionFactor} To
+% conveniently globally adjust the vertical spacings in the document (including
+% the section and paragraph vertical spacings, as well as the spacing above and
+% below theorems, itemize, and enumerate environments), you can also use the
+% |compressverticalspacing=X| class option.  Alternatively, you can redefine the
+% macro |\phfeaVerticalSpacingCompressionFactor| to the desired compression
+% factor:
+% \begin{verbatim}
+% \renewcommand\phfeaVerticalSpacingCompressionFactor{0.7}
+% \end{verbatim}
+%
+% \DescribeMacro{\phfeaDefineTheoremStyle} Because the theorem style
+% |phfextendedabstracthm| is defined at the time that the class is loaded, any
+% customization of |\phfeaVerticalSpacingCompressionFactor| and
+% |\phfeaListsVerticalSkip| that happen later in the preamble aren't taken into
+% account.  If you change these values in your preamble, you should call
+% |\phfeaDefineTheoremStyle| to redefine the theorem style after your
+% customization.
+%
+% \DescribeMacro{\phfeaDisplayVerticalSpacingFactorWeight} The
+% vertical spacing factor also affects the vertical spacing around equations,
+% but to a lesser extent. (Compressing the space around the equations by too
+% much would not look nice.) For the spacing between equations, we take the
+% weighted average of $1$ and the vertical spacing compression factor, where the
+% weight is given in the macro |\phfeaDisplayVerticalSpacingFactorWeight|.  A
+% weight of |0| means the vertical compression factor doesn't affect the
+% vertical spacing around equations at all; a weight of |1| means the spacing
+% around the equations is scaled exactly by the vertical compression factor.
+%
+% \DescribeMacro{\phfeaParskipVerticalSpacingFactorWeight} A similar mechanism
+% happens for how we adjust |\parskip|, the spacing between paragraphs.
+%
+%
+% \subsection{List environments}
+%
+% \DescribeEnv{enumerate*} This class provides an |enumerate|-like
+% environment which typesets its items inline, as a list.  For example, here is
+% an inline paragraph with (a) one, (b) two, and (c) three points.
+% \iffalse yeah, I cheated for this doc code, whatever \fi
+%
+% The |enumerate*| can be used exactly like you'd use the |enumerate|
+% environment from the \pkgname{enumitem} package, for instance:
+% \begin{verbatim}
+% here is an inline paragraph with \begin{enumerate*}[label=(\alph*)]
+% \item one,
+% \item two,
+% \item three
+% \end{enumerate*}
+% points.
+% \end{verbatim}
+%
+% Check \pkgname{enumitem}'s documentation for inline lists.  You can specify
+% for instance the keys |before={{}}|, |itemjoin={{ }}|, and \relax\relax\relax
+% |itemjoin*={{ and }}| either as an optional argument to
+% |\begin{enumerate*}| \iffalse\end{enumerate*}\fi or using
+% |\setlist|:
+% \begin{verbatim}
+% \setlist[enumerate*]{%
+%   itemjoin*={{ et }}%
+% }
+% \end{verbatim}
+%
+% \DescribeMacro{\phfeaListsVerticalSkip} \DescribeMacro{\phfeaListsItemSep}
+% \DescribeMacro{\phfeaListsParSep} For (non-inline) list environments such as
+% |itemize| and |enumerate|, you can redefine |\phfeaListsVerticalSkip|,
+% |\phfeaListsItemSep|, and |\phfeaListsParSep| to set the |topsep|, |itemsep|
+% and |parsep| properties of all of \pkgname{enumitem}'s list environments.
+% These correspond to the vertical space above and below lists, the space
+% between items, and the space between paragraphs within an item.  All these
+% spacings automatically get compressed according to the
+% |\phfeaVerticalSpacingCompressionFactor|.
+%
+% Note that |\phfeaListsVerticalSkip| is also used for the spacing above and
+% below theorem environments.
+%
+%
+% \subsection{Customization of the main title and general headings style}
+% \label{sec:customize-title-and-headings-style}
+%
+% \DescribeMacro{\phfeaHeadingStyle} The macro |\phfeaHeadingStyle| is defined to be
+% |\sffamily|, unless the |sansstyle=false| class option is provided
+% in which case the macro expands to nothing.  You can redefine it to give a
+% different general style to your main title and your section and paragraph
+% headings.
+%
+% \DescribeMacro{\phfeaTitleStyle} The macro |\phfeaTitleStyle| sets the font
+% style for the main document title.  By default the macro is defined to
+% |\phfeaHeadingStyle\Large|.  Redefine this macro to change the title style.
+%
+% For instance, if you prefer \RevTeX's own simple boldface title, you can use:
+% \begin{verbatim}
+% \renewcommand\phfeaTitleStyle{\bfseries}
+% \end{verbatim}
+%
+%
+%
+%
+%
+% \StopEventually{\vskip 3cm plus 2cm minus 2cm\relax\PrintChanges
+%     \vskip 3cm plus 2cm minus 2cm\relax\PrintIndex}
+%
+%
+%
+% \section{Implementation}
+%
+% Here come the gory details.
+%
+%
+% \paragraph{Class options}
+% We process these first, to see which options we should pass on to
+% \RevTeX.
+%    \begin{macrocode}
+\RequirePackage{kvoptions}
+\SetupKeyvalOptions{%
+  family=phfea,%
+  prefix=phfeaopt@%
+}
+\DeclareStringOption[]{papertype}
+\DeclareStringOption[11pt]{ptsize}
+\DeclareBoolOption[true]{sectiondecorations}
+\DeclareBoolOption[true]{paragraphdecorations}
+\DeclareVoidOption{noheadingdecorations}{%
+  \phfeaopt@sectiondecorationsfalse
+  \phfeaopt@paragraphdecorationsfalse
+}
+\DeclareBoolOption[true]{loadtheorems}
+\DeclareBoolOption[true]{sansstyle}
+\DeclareStringOption[1]{compressverticalspacing}
+\DeclareBoolOption[true]{usehyperref}
+\DeclareStringOption[extended]{pkgset}
+\ProcessKeyvalOptions*
+%    \end{macrocode}
+%
+%
+% \paragraph{Load \RevTeX, the base class}
+%
+%    \begin{macrocode}
+\providecommand\phfea@revtexopts{%
+  aps,pra,%
+  notitlepage,reprint,%
+  onecolumn,tightenlines,%
+  superscriptaddress,%
+  nofootinbib%
+}
+\PassOptionsToClass{%
+  \phfea@revtexopts,%
+  \phfeaopt@ptsize,%
+  \phfeaopt@papertype,%
+}{revtex4-2}
+\LoadClass{revtex4-2}
+%    \end{macrocode}
+%
+% We will also need the \pkgname{xparse} command for defining some of our
+% commands.
+%    \begin{macrocode}
+\RequirePackage{xparse}
+%    \end{macrocode}
+% 
+% \paragraph{Load \pkgname{phfnote} for the basic document setup}
+%
+%    \begin{macrocode}
+\PassOptionsToPackage{%
+  preset=reset,%
+  pkgset=\phfeaopt@pkgset,%
+  \ifphfeaopt@usehyperref
+    hyperrefdefs={defer,noemail},%
+  \fi
+}{phfnote}
+\RequirePackage{phfnote}
+%    \end{macrocode}
+%
+%
+% \paragraph{Page geometry}
+%
+% Set a default page geometry.  Works both for A4 paper and for letter paper.
+% It's optimized for 11pt size, though.
+%    \begin{macrocode}
+\RequirePackage{geometry}
+\geometry{hmargin=0.75in,vmargin=0.75in,marginparwidth=0.5in,marginparsep=0.125in}
+%    \end{macrocode}
+% 
+%
+% \paragraph{Default sans serif font}
+%
+% \begin{macro}{\phfeaHeadingStyle}
+%   Unless instructed not to do so, \iffalse load the ``Source Sans Pro'' font
+%   as default sans serif font, using the semibold glyphs in place of bold.  By
+%   default, this font will \else set the sans serif font family to \fi be used
+%   for section headings and the main title.
+%    \begin{macrocode}
+\ifphfeaopt@sansstyle
+  \def\phfeaHeadingStyle{\sffamily}
+\else
+  \def\phfeaHeadingStyle{}
+\fi
+%    \end{macrocode}
+% \end{macro}
+%
+%
+% \paragraph{Default title format}
+%
+% \begin{macro}{\phfeaTitleStyle}
+%   Change \RevTeX\ title format.  Title style can be customized by redefining
+%   |\phfeaTitleStyle|.
+%    \begin{macrocode}
+\def\phfeaTitleStyle{\phfeaHeadingStyle\Large}
+\def\frontmatter@title@format{\phfeaTitleStyle\centering\parskip\z@skip}
+%    \end{macrocode}
+% \end{macro}
+%
+%
+% \paragraph{Vertical spacing compression factor}
+%
+% Define a general factor by which the section and paragraph spacings will be
+% compressed.  This macro is set by the |compressverticalspacing=X| package
+% option.
+%    \begin{macrocode}
+\edef\phfeaVerticalSpacingCompressionFactor{\phfeaopt@compressverticalspacing}
+%    \end{macrocode}
+%
+% Tool for scaling glue expressions (for use with our vertical compression
+% factor):\footnote{Thanks \url{https://tex.stackexchange.com/a/198966/32188}\,!}
+%    \begin{macrocode}
+\def\phfea@scaleglue#1#2{% {factor}{glueexpr}
+  \glueexpr#2*\numexpr\dimexpr#1pt\relax\relax/65536\relax
+}
+\def\phfea@scalegluedpt#1#2{% {factor given as dimexpr in pt}{glueexpr}
+  \glueexpr#2*\numexpr#1\relax/65536\relax
+}
+%    \end{macrocode}
+%
+% Adjust spacing around display equations according to the vertical compression
+% factor.  Do this only at the beginning of the document, since the user might
+% still want to adjust |\phfeaVerticalSpacingCompressionFactor| in their
+% preamble.
+%
+% \begin{macro}{\phfeaDisplayVerticalSpacingFactorWeight}
+% We only apply a fraction of the scaling, because it's ugly if we compress
+% equations too much.  Define |\phfeaDisplayVerticalSpacingFactorWeight| as $w$ and
+% $\alpha$ as the vertical scaling factor.  The new skips are computed as
+% \begin{equation*}
+%   \phfverb{oldskip}\quad\rightarrow\quad
+%     (1-w)\,\phfverb{oldskip} + w\,\alpha\,\phfverb{oldskip}\ .
+% \end{equation*}
+% (For $w=0$ we have $\phfverb{oldskip}\rightarrow\phfverb{oldskip}$.  For $w=1$
+% the full scaling factor is applied,
+% $\phfverb{oldskip}\rightarrow \alpha\,\phfverb{oldskip}$.)  By default,
+% $w=1/2$:
+%    \begin{macrocode}
+\def\phfeaDisplayVerticalSpacingFactorWeight{.5}
+%    \end{macrocode}
+% \end{macro}
+% Tool to compute the new spacing for each of the relevant display-related
+% skips:
+%    \begin{macrocode}
+\def\phfea@adjustskipweighted#1#2{%
+  #1=\glueexpr
+    \phfea@scalegluedpt{%
+      \dimexpr 1\p@ - #2\p@\relax
+    }{#1}%
+    +
+    \phfea@scaleglue{%
+      #2%
+    }{%
+      \phfea@scaleglue{%
+        \phfeaVerticalSpacingCompressionFactor
+      }{%
+        #1
+      }%
+    }%
+    \relax
+}
+%    \end{macrocode}
+% And schedule this adjustment to be carried out at the beginning of the
+% document.
+%    \begin{macrocode}
+\AtBeginDocument{%
+  \phfea@adjustskipweighted\abovedisplayskip\phfeaDisplayVerticalSpacingFactorWeight
+  \phfea@adjustskipweighted\belowdisplayskip\phfeaDisplayVerticalSpacingFactorWeight
+  \phfea@adjustskipweighted\abovedisplayshortskip\phfeaDisplayVerticalSpacingFactorWeight
+  \phfea@adjustskipweighted\belowdisplayshortskip\phfeaDisplayVerticalSpacingFactorWeight
+}
+%    \end{macrocode}
+%
+% \begin{macro}{\phfeaParskipVerticalSpacingFactorWeight}
+%   A similar mechanism affects how we adjust the paragraph skip length
+%   |\parskip|.
+%    \begin{macrocode}
+\def\phfeaParskipVerticalSpacingFactorWeight{1}
+\AtBeginDocument{%
+  \phfea@adjustskipweighted\parskip\phfeaParskipVerticalSpacingFactorWeight
+}
+%    \end{macrocode}
+% \end{macro}
+% 
+% \paragraph{Setup specific for sectioning}
+%
+% By design, there are only two sectioning levels in a
+% \pkgname{phfextendedabstract} document: sections (|\section|) and paragraphs
+% (|\paragraph|).  Any other sectioning command (e.g., |\subsection|) will
+% produce an error.
+%
+% Neither of these two section levels is numbered.
+%    \begin{macrocode}
+\setcounter{secnumdepth}{0}
+\setcounter{tocdepth}{1}
+%    \end{macrocode}
+%
+% \begin{macro}{\phfeaSectionBeforeSkip}
+% \begin{macro}{\phfeaSectionAfterHSkip}
+% \begin{macro}{\phfeaSectionStyle}
+% \begin{macro}{\phfeaSectionDecoration}
+% \begin{macro}{\phfeaSectionDecorationSymbol}
+%   Some helper and customization macros for |\section|.
+%    \begin{macrocode}
+\def\phfeaSectionBeforeSkip{1.5ex plus 0.8ex minus 0.25ex}
+\def\phfeaSectionAfterHSkip{1em plus 0.2em}
+\def\phfeaSectionStyle{\normalfont\normalsize\phfeaHeadingStyle\bfseries}
+\def\phfeaSectionFormatHeading#1{#1}
+\def\phfeaSectionDecorationSymbol{%
+  \raisebox{0.2ex}{{\notesmaller[0.4]{\ensuremath{\blacksquare}}}}}
+\ifphfeaopt@sectiondecorations
+  \def\phfeaSectionDecoration#1{%
+    \makebox[\z@][r]{{#1}\hspace*{1.5ex}}%
+  }
+\else
+  \def\phfeaSectionDecoration#1{}
+\fi
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \needspace{5\baselineskip}
+% \begin{macro}{\phfeaParagraphBeforeSkip}
+% \begin{macro}{\phfeaParagraphAfterHSkip}
+% \begin{macro}{\phfeaParagraphStyle}
+% \begin{macro}{\phfeaParagraphDecoration}
+% \begin{macro}{\phfeaParagraphDecorationSymbol}
+%   Same helper and customization macros, now for |\paragraph|.
+%    \begin{macrocode}
+\def\phfeaParagraphBeforeSkip{0.6ex plus 0.4ex minus 0.1ex}
+\def\phfeaParagraphAfterHSkip{0.75em plus 0.15em}
+\def\phfeaParagraphStyle{\normalfont\normalsize\phfeaHeadingStyle\small}
+\def\phfeaParagraphFormatHeading#1{#1}
+\def\phfeaParagraphDecorationSymbol{%
+  \raisebox{0.2ex}{{\notesmaller[0.6]{\ensuremath{\triangleright}}}}}
+\ifphfeaopt@paragraphdecorations
+  \def\phfeaParagraphDecoration#1{%
+    \makebox[\z@][r]{{#1}\hspace*{1ex}}%
+  }
+\else
+  \def\phfeaParagraphDecoration#1{}
+\fi
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% 
+% Now we redefine |\section| and |\paragraph| for formatting.  Also allow
+% |\section!| and |\paragraph!| that remove the decoration and |\section<...>|
+% and |\paragraph<...>| that replace the decoration.  In all cases, the indent
+% is removed if the main argument (section/paragraph title) is an empty
+% argument.  We also accept a starred version and an optional argument, and pass
+% those on to |\@startsection|; these options are sometimes useful in order to
+% work around fragile tokens in the title, etc.
+%
+% We start with the generic code that will call |\@startsection| for both
+% sections and paragraphs.  The generic code will be given the level number (|1|
+% or |2|) and will produce the correct |\@startsection| code for that level,
+% fetching its information from the correctly named macros.  We first define
+% some simple definitions that specify where to look for those level-specific
+% macros.
+%    \begin{macrocode}
+\def\phfea@ss@levelname#1{\ifcase#1\or section\or paragraph\fi}
+\def\phfea@ss@levelName#1{\ifcase#1\or Section\or Paragraph\fi}
+\def\phfea@ss@get#1#2{% <levelno><MacroPostfixName>
+  \csname phfea\phfea@ss@levelName{#1}#2\endcsname}
+\def\phfea@ss@getnoexpand#1#2{% <levelno><MacroPostfixName>
+  \expandafter\noexpand\csname phfea\phfea@ss@levelName{#1}#2\endcsname}
+%    \end{macrocode}
+%
+% \begin{macro}{\phfea@startsection}
+%   We now define the main internal |\phfea@startsection| macro which will
+%   produce the correct |\@startsection| command for the given section level.
+%   The arguments to |\phfea@startsection| are:
+%   \begin{itemize}[itemsep=0pt,topsep=0pt]
+%   \item[\#1:] level number, |1| or |2|;
+%   \item[\#2:] an optional star;
+%   \item[\#3:] an optional |!| character (meaning, don't display the decoration);
+%   \item[\#4:] an optional |<|\meta{decoration tokens}|>| argument to
+%     replace the decoration;
+%   \item[\#5:] an optional argument, the alternative title to write in the AUX
+%     file (e.g.\@ for use in the table of contents);
+%   \item[\#6:] a mandatory argument, the title of the section/paragraph.
+%   \end{itemize}
+%    \begin{macrocode}
+\newtoks\phfea@ss@decorationtoks
+\newtoks\phfea@ss@alttitle
+\newtoks\phfea@ss@title
+\NewDocumentCommand{\phfea@startsection}{m s t! d<> o m}{%
+%    \end{macrocode}
+% Store the alternative title and title in token registers.
+%    \begin{macrocode}
+  \phfea@ss@decorationtoks={#4}%
+  \phfea@ss@alttitle={#5}%
+  \phfea@ss@title={#6}%
+%    \end{macrocode}
+% Inform the user in case of option inconsistencies or redundancies.
+%    \begin{macrocode}
+  \IfNoValueF{#4}{%
+    \IfBooleanT{#3}{%
+      \PackageWarning{phfextendedabstract}{section/paragraph: `!'
+        modifier ignored when custom decoration `<...>' is specified}%
+    }%
+  }%
+%    \end{macrocode}
+% Now define a temporary macro |\x| that will contain the correct code for a
+% call to \LaTeX' low-level |\@startsection| command.  Remember to prefix all
+% macros by |\noexpand| unless they should be expanded in the preparation of
+% that code for |\@startsection|.  \LaTeX' |\@startsection| takes a lot of
+% arguments, let's be careful not to miss any.  Also, we can use the convenient
+% construct |\phfea@ss@getnoexpand{#1}{XyzProperty}| which in this |\edef| will
+% expand to
+% |\noexpand\phfea|\emph{$\langle$}|Section|\emph{\textbar}\relax
+% |Paragraph|\emph{$\rangle$}|XyzProperty|.
+%    \begin{macrocode}
+  \edef\x{%
+    \noexpand\@startsection{\phfea@ss@levelname{#1}}%
+%    \end{macrocode}
+% First come the \meta{level number} and \meta{indent} arguments:
+%    \begin{macrocode}
+      {#1}%
+      {\z@}%
+%    \end{macrocode}
+% Then comes the \meta{before skip} argument.  Use |\phfea@scaleglue| to account for
+% the vertical compression factor.
+%    \begin{macrocode}
+      {%
+        \noexpand\phfea@scaleglue{\noexpand\phfeaVerticalSpacingCompressionFactor}{%
+          \noexpand\glueexpr\phfea@ss@getnoexpand{#1}{BeforeSkip}\noexpand\relax
+        }%
+      }%
+%    \end{macrocode}
+% Then comes the \meta{after skip} argument.  Set the after skip to zero if the
+% title is empty, otherwise specify the given
+% |\phfeaSection/ParagraphAfterHSkip| as a negative value to indicate we want a
+% run-in heading.  Note that while the syntax `|1.5\glueexpr...|' doesn't
+% preserve plus/minus stretchability components as it coerces the glue to a
+% dimen, the syntax `|-\glueexpr...|' does preserve these components (presumably
+% because $-1$ is integer?).
+%    \begin{macrocode}
+      {\if\relax\detokenize{#6}\relax
+          \noexpand\z@
+        \else
+          -\noexpand\glueexpr\phfea@ss@getnoexpand{#1}{AfterHSkip}\noexpand\relax
+        \fi}%
+%    \end{macrocode}
+% The \meta{style} argument to specify the section heading's font style.  We
+% provide a decoration, possibly a custom decoration if provided with the
+% |<...>| syntax; we remove the default decoration if the no-decoration argument
+% (a |!| character) was specified.
+%    \begin{macrocode}
+      {%
+        \IfNoValueTF{#4}{%
+          \IfBooleanTF{#3}{% with "!", no custom decoration --> nothing
+          }{% no "!", no custom decoration
+            \phfea@ss@getnoexpand{#1}{Decoration}%
+            \phfea@ss@getnoexpand{#1}{DecorationSymbol}%
+          }%
+        }{% with custom decoration (ignores "!" argument)
+          \phfea@ss@getnoexpand{#1}{Decoration}%
+          {\the\phfea@ss@decorationtoks}%
+        }%
+        \phfea@ss@getnoexpand{#1}{Style}%
+      }%
+%    \end{macrocode}
+% An optional |*| indicates the starred version of the sectioning commands.  If
+% the user increased the |secnumcounter| to have numbered sections, then the
+% starred variant gives a section heading without any section number or TOC
+% entry.
+%    \begin{macrocode}
+      \IfBooleanT{#2}{*}%
+%    \end{macrocode}
+% Now comes the optional \meta{alternative title} argument that will be written
+% to the AUX file.  We always provide this argument to |\@startsection|,
+% specifying by default the main title argument |#6| (non-starred variant) or an
+% empty argument (for a starred variant).  We do this because otherwise,
+% |\@startsection| will copy all the other commands we add in its argument
+% (e.g., title formatting, etc.) and will write them to the AUX file.
+%    \begin{macrocode}
+      \IfValueTF{#4}{[\the\phfea@ss@alttitle]}{%
+        \IfBooleanTF{#2}{[]}{[\the\phfea@ss@title]}%
+      }%
+%    \end{macrocode}
+% Finally, this is the main \meta{section title} argument.  
+% If the title is not empty, we also provide the title wrapped in a
+% corresponding |\phfeaSection/ParagraphFormatHeading| macro call.  Everything
+% should be protected in |\texorpdfstring| calls to avoid \emph{pdflatex} from
+% complaining about invalid junk in PDF bookmark strings.
+%    \begin{macrocode}
+      {%
+        \if\relax\detokenize{#6}\relax\else
+          \noexpand\texorpdfstring{%
+            \phfea@ss@getnoexpand{#1}{FormatHeading}{\the\phfea@ss@title}%
+          }{%
+            \the\phfea@ss@title
+          }%
+        \fi
+      }%
+  }%
+  %\message{**** EMITTING @startsection: |\detokenize\expandafter{\x}| ***}%
+  \x
+}
+%    \end{macrocode}
+% \end{macro}
+% 
+% \begin{macro}{\section}
+% \begin{macro}{\paragraph}
+%   Define |\section| and |\paragraph| as sectioning levels 1 and 2.
+%    \begin{macrocode}
+\def\section{\phfea@startsection{1}}
+\def\paragraph{\phfea@startsection{2}}
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% 
+% Provide an explanative error message if the user attempts to use
+% |\subsection|, |\subsubsection| or |\subparagraph|.
+%    \begin{macrocode}
+\def\phfea@nosectioncmd#1{%
+  \ClassError{phfextendedabstract}{%
+    %
+    There is no `\string#1' command in `phfextendedabstract'
+    documents.  You can only use `\string\section' and
+    `\string\paragraph'.  If you find yourself needing additional
+    sectioning levels, it might be that your extended abstract is too
+    detailed and you should stick to a higher level description of
+    your results.  If you do need additional section levels, it is
+    likely that you will be better off with a different document
+    class.  If you'd like to stick with `phfextendedabstract' and you
+    really know what you're doing, then you could redefine the
+    sectioning commands as necessary based on `\string\@startsection'
+    as is done in standard LaTeX classes.  Good luck!
+    %
+  }{}%
+}
+\def\phfea@nosectioncmd@def#1{%
+  \def#1{\phfea@nosectioncmd#1}%
+}
+\phfea@nosectioncmd@def\part
+\phfea@nosectioncmd@def\chapter
+\phfea@nosectioncmd@def\subsection
+\phfea@nosectioncmd@def\subsubsection
+\phfea@nosectioncmd@def\subparagraph
+%    \end{macrocode}
+%
+%
+% \paragraph{Set up itemization and enumeration environments}
+%
+% Provide customizable lengths for lists via macros (item sep,
+% paragraph sep and vertical skip above and below list environments).
+% \begin{macro}{\phfeaListsVerticalSkip}
+% \begin{macro}{\phfeaListsItemSep}
+% \begin{macro}{\phfeaListsParSep}
+%    \begin{macrocode}
+\def\phfeaListsVerticalSkip{0.6ex plus 0.4ex minus 0.1ex}
+\def\phfeaListsItemSep{0.3ex plus 0.15ex minus 0.1ex}
+\def\phfeaListsParSep{0.7\parskip}
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% Prepare the commands to run to configure \pkgname{enumitem} correctly in an
+% internal macro which we will call if \pkgname{enumitem} is indeed loaded.
+%    \begin{macrocode}
+\def\phfea@setup@enumitem{%
+%    \end{macrocode}
+% Apply the spacings.
+%    \begin{macrocode}
+  \setlist{%
+    itemsep={%
+      \phfea@scaleglue{%
+        \phfeaVerticalSpacingCompressionFactor}{\phfeaListsItemSep}},
+    parsep={%
+      \phfea@scaleglue{%
+        \phfeaVerticalSpacingCompressionFactor}{\phfeaListsParSep}},
+    topsep={%
+      \phfea@scaleglue{%
+        \phfeaVerticalSpacingCompressionFactor}{\phfeaListsVerticalSkip}},
+  }%
+%    \end{macrocode}
+% \begin{environment}{enumerate*}
+% Create the |enumerate*| list enumeration environment.
+%    \begin{macrocode}
+  \newlist{enumerate*}{enumerate*}{1}
+  \setlist[enumerate*]{
+    label={(\roman*)},
+    before={},
+    itemjoin={{ }},
+    itemjoin*={{ and }}
+  }%
+}
+%    \end{macrocode}
+% \end{environment}
+% And now, check if \pkgname{enumitem} is loaded and apply the definitions.
+%    \begin{macrocode}
+\@ifpackageloaded{enumitem}{\phfea@setup@enumitem}{}
+%    \end{macrocode}
+% 
+%
+% \paragraph{Setup specific for theorems}
+%
+% Create a new theorem style called |extendedabstracthm|.  Note that if
+% \pkgname{amsthm} (or similar) wasn't loaded, then |\newtheoremstyle| isn't
+% defined.  In that case, we simply won't define the new theorem style right
+% now.
+%    \begin{macrocode}
+\def\phfeaDefineTheoremStyle{%
+  \newtheoremstyle{phfextendedabstractthm}%
+    {\phfea@scaleglue{%
+        \phfeaVerticalSpacingCompressionFactor}{\phfeaListsVerticalSkip}}%
+    {\phfea@scaleglue{%
+        \phfeaVerticalSpacingCompressionFactor}{\phfeaListsVerticalSkip}}%
+    {\itshape}%
+    {\z@}%
+    {\bfseries\itshape}%
+    {:}%
+    {0.8em}%
+    {\thmname{##1\thmnumber{ ##2}\thmnote{ (##3)}}}%
+}
+%    \end{macrocode}
+% Ensure we create our new theorem style (only if |\newtheoremstyle| is
+% available) and load our \pkgname{phfthm} package.  Make sure we don't load
+% \pkgname{phfthm} if we were asked not to load theorems in the class options.
+%    \begin{macrocode}
+\ifdefined\newtheoremstyle
+  \phfeaDefineTheoremStyle
+\fi
+\ifphfeaopt@loadtheorems
+  \ifdefined\newtheoremstyle\else
+    \ClassError{phfextendedabstract}{%
+      %
+      Impossible to load theorems (`loadtheorems=true') because there
+      is no \string\newtheoremstyle\space command that was defined.
+      Consider setting `pkgset=...' so that a theroems-related package
+      (e.g., amsthm) is loaded!  (e.g. `pkgset=minimal', `pkgset=rich'
+      or `pkgset=extended').  Alternatively, set the class option
+      `loadtheorems=false' and you can then manually define any
+      theorem environments you'd like using your favorite pacakges.
+      %
+    }{}
+  \fi
+  \PassOptionsToPackage{proofref=false,theoremstyle=phfextendedabstractthm}{phfthm}
+  \RequirePackage{phfthm}
+\fi
+%    \end{macrocode}
+%
+% \iffalse
+% \paragraph{References section}
+%
+% Have a simple section for references.  If you'd like to restore \RevTeX'
+% ornament you can simply do |\let\bibsection\rtxapsbibsection|.
+%    \begin{XXXmacrocode}
+%% \let\rtxapsbibsection\bibsection
+%% \def\bibsection{%
+%%   \par\section{\refname}\leavevmode\par\addvspace{4pt}\relax
+%% %%  \par\noindent\rule{6em}{.4pt}\par\addvspace{6pt}\relax
+%% }
+%    \end{XXXmacrocode}
+% \fi
+%
+%
+%\Finale
+\endinput
diff --git a/Master/texmf-dist/source/latex/phfextendedabstract/phfextendedabstract.ins b/Master/texmf-dist/source/latex/phfextendedabstract/phfextendedabstract.ins
new file mode 100644
index 00000000000..820fc906871
--- /dev/null
+++ b/Master/texmf-dist/source/latex/phfextendedabstract/phfextendedabstract.ins
@@ -0,0 +1,55 @@
+%%
+%% Copyright (C) 2021 by Philippe Faist, philippe.faist@bluewin.ch
+%%
+%% This file may be distributed and/or modified under the conditions of
+%% the LaTeX Project Public License, either version 1.3 of this license
+%% or (at your option) any later version.  The latest version of this
+%% license is in:
+%% 
+%%    http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3 or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%%
+
+\input docstrip.tex
+\keepsilent
+
+\usedir{tex/latex/phfqitltx}
+
+\preamble
+
+This is a generated file.
+
+Copyright (C) 2021 by Philippe Faist, philippe.faist@bluewin.ch
+
+This file may be distributed and/or modified under the conditions of
+the LaTeX Project Public License, either version 1.3 of this license
+or (at your option) any later version.  The latest version of this
+license is in:
+
+   http://www.latex-project.org/lppl.txt
+
+and version 1.3 or later is part of all distributions of LaTeX version
+2005/12/01 or later.
+
+\endpreamble
+
+\generate{\file{phfextendedabstract.cls}{\from{phfextendedabstract.dtx}{package}}}
+
+\obeyspaces
+\Msg{*************************************************************}
+\Msg{*                                                           *}
+\Msg{* To finish the installation you have to move the following *}
+\Msg{* file into a directory searched by TeX:                    *}
+\Msg{*                                                           *}
+\Msg{*     phfextendedabstract.cls                               *}
+\Msg{*                                                           *}
+\Msg{* To produce the documentation run the .dtx file through    *}
+\Msg{* (PdF-)LaTeX.                                              *}
+\Msg{*                                                           *}
+\Msg{* Happy TeXing!                                             *}
+\Msg{*                                                           *}
+\Msg{*************************************************************}
+
+\endbatchfile
diff --git a/Master/texmf-dist/source/latex/phfextendedabstract/pkg.mk b/Master/texmf-dist/source/latex/phfextendedabstract/pkg.mk
new file mode 100644
index 00000000000..328b5fc36d3
--- /dev/null
+++ b/Master/texmf-dist/source/latex/phfextendedabstract/pkg.mk
@@ -0,0 +1,188 @@
+
+#
+# Common useful definitions
+#
+LATEX = latex
+
+PDFLATEXNAME = pdflatex
+
+PDFLATEX = TEXINPUTS="$$TEXINPUTS:../phfnote" $(PDFLATEXNAME)
+PDFLATEXOPTS = -interaction=batchmode
+PDFLATEXOPTSLAST = -interaction=batchmode --synctex=1
+
+MAKEINDEX = makeindex
+
+
+#
+# Set default PREFIX. This can be overridden with 'make install PREFIX=/installation/directory'
+#
+DEFAULT_PREFIX := $(shell kpsewhich -var-value TEXMFHOME)
+PREFIX ?= $(DEFAULT_PREFIX)
+
+
+#
+# package should be set in variable PKG
+#
+PKGREADME = README.md
+
+#
+# packages may specify additional files in the distribution with this variable
+# (by default empty)
+#
+DIST_ADDITIONAL_FILES ?= 
+
+#
+# Additional files automatically generated by the .ins file, such as .def files
+# (by default empty)
+#
+ADDITIONAL_GENERATED_FILES ?= 
+
+
+# By default, the generated style file is a '.sty' latex package.  If it's a
+# '.cls' class file instead, the local Makefile will redefine this to 'cls'.
+PKGSTYEXT ?= sty
+
+PKGDTX = $(PKG).dtx
+PKGSTY = $(PKG).$(PKGSTYEXT)
+PKGINS = $(PKG).ins
+PKGPDF = $(PKG).pdf
+PKGTDSZIP = $(PKG).tds.zip
+PKGZIP = $(PKG).zip
+
+
+.PHONY: help sty cls pdf install install_sty install_cls install_doc tdszip dist clean cleanall cleansty cleancls cleanaux cleanpdf cleantdszip cleandist
+
+
+help:
+	@echo "Targets for $(PKG):"
+	@echo "make $(PKGSTYEXT)             -- generate LaTeX package file $(PKG).$(PKGSTYEXT)"
+	@echo "make pdf             -- generate pdf documentation"
+	@echo "make install         -- install style and documentation files to $(DEFAULT_PREFIX)"
+	@echo "make install PREFIX=[specify texmf directory destination]"
+	@echo "make $(PKG).tds.zip  -- create TDS.ZIP package for distribution"
+	@echo "make dist            -- create distribution ZIP, ready for upload to CTAN"
+	@echo "make clean           -- remove LaTeX auxiliary files"
+	@echo "make clean$(PKGSTYEXT)        -- remove generated style file"
+	@echo "make cleanpdf        -- remove generated pdf documentation"
+	@echo "make cleanall        -- remove all generated files, incl. distribution zip"
+
+
+clean: cleanaux
+
+cleanall: cleansty cleanaux cleanpdf cleantdszip cleandist
+
+# ------------------------------------------------
+# make sty
+# ------------------------------------------------
+
+sty: $(PKGSTY)
+
+# synonym of `sty` in case of LaTeX classes, we use same commands etc.
+cls: $(PKGSTY)
+
+$(PKGSTY): $(PKGINS) $(PKGDTX)
+	$(LATEX) $<
+
+cleansty:
+	@rm -f $(PKGSTY) $(ADDITIONAL_GENERATED_FILES)
+
+cleancls: cleansty
+
+
+# ------------------------------------------------
+# make pdf
+# ------------------------------------------------
+
+pdf: $(PKG).pdf
+
+#
+# fake index & glossary so they get a TOC entry from the beginning, and so the page
+# numbers in the index are correct.
+#
+$(PKG).aux $(PKG).idx $(PKG).glo: $(PKGDTX) $(PKGSTY)
+	DTX=$< ; echo '\\begin{theindex}\\item index here \\end{theindex}' >$${DTX%.dtx}.ind
+	DTX=$< ; echo '\\begin{theglossary}\\item changes here\\end{theglossary}' >$${DTX%.dtx}.gls
+	$(PDFLATEX) $(PDFLATEXOPTS) $<
+	$(PDFLATEX) $(PDFLATEXOPTS) $<
+	$(PDFLATEX) $(PDFLATEXOPTS) $<
+
+$(PKG).ind: $(PKG).idx
+	$(MAKEINDEX) -s gind.ist -o $@ $<
+
+$(PKG).gls: $(PKG).glo
+	$(MAKEINDEX) -s gglo.ist -o $@ $<
+
+# final steps of making the PKG.pdf doc file.  At the end, touch the ind and gls files so
+# that they don't look out-of-date (because the idx and glo files were overwritten again)
+$(PKGPDF): $(PKGDTX) $(PKG).aux $(PKG).ind $(PKG).gls
+	$(PDFLATEX) $(PDFLATEXOPTS) $<
+	$(PDFLATEX) $(PDFLATEXOPTS) $<
+	$(PDFLATEX) $(PDFLATEXOPTSLAST) $<
+	touch $(PKG).ind $(PKG).gls $(PKG).pdf
+
+
+cleanaux:
+	@rm -f *.aux *.log *.toc *.glo *.gls *.ind *.idx *.ilg *.out *.bbl *.blg *.synctex.gz *.hd
+
+cleanpdf:
+	@rm -f $(PKGPDF)
+
+# ------------------------------------------------
+# 'make install' partial installation targets
+# ------------------------------------------------
+
+#
+# The install target itself is defined per-package, in case packages want to install more
+# files (such as bibtex styles)
+#
+
+install_sty: $(PKGSTY)
+	mkdir -p $(DESTDIR)$(PREFIX)/tex/latex/$(PKG)
+	cp $(PKGSTY) $(ADDITIONAL_GENERATED_FILES)  $(DESTDIR)$(PREFIX)/tex/latex/$(PKG)
+
+install_cls: install_sty
+
+install_doc: $(PKGPDF)
+	mkdir -p $(DESTDIR)$(PREFIX)/doc/latex/$(PKG)
+	cp $(PKGPDF) $(PKGREADME)  $(DESTDIR)$(PREFIX)/doc/latex/$(PKG)
+
+
+
+# ------------------------------------------------
+# make tdszip
+# ------------------------------------------------
+
+TDSTMPDIR = $(CURDIR)/_install_tds_zip.make.tmp
+
+tdszip: $(PKGTDSZIP)
+
+$(PKGTDSZIP): $(PKGSTY) $(PKGPDF)
+	mkdir $(TDSTMPDIR)
+	$(MAKE) install PREFIX=$(TDSTMPDIR)
+	cd $(TDSTMPDIR) && zip -r $(CURDIR)/$(PKGTDSZIP) *
+	rm -rf $(TDSTMPDIR)
+
+cleantdszip:
+	@rm -f $(PKGTDSZIP)
+
+
+# ------------------------------------------------
+# make dist
+# ------------------------------------------------
+
+DISTTMPDIR = $(CURDIR)/_install_dist_zip.make.tmp
+
+dist: $(PKGZIP)
+
+# feedback from CTAN upload manager: prefer not to provide tds.zip in CTAN upload
+$(PKGZIP):  #$(PKGTDSZIP)
+	rm -rf $(DISTTMPDIR)
+	mkdir -p $(DISTTMPDIR)/$(PKG)
+#	 cp $(PKGTDSZIP) $(DISTTMPDIR)
+	cp $(PKGDTX) $(PKGINS) $(PKGPDF) $(PKGREADME) Makefile pkg.mk $(DIST_ADDITIONAL_FILES) $(DISTTMPDIR)/$(PKG)
+#	cd $(DISTTMPDIR) && zip -r $(CURDIR)/$(PKGZIP) $(PKG) $(PKGTDSZIP)
+	cd $(DISTTMPDIR) && zip -r $(CURDIR)/$(PKGZIP) $(PKG)
+	rm -rf $(DISTTMPDIR)
+
+cleandist:
+	@rm -f $(PKGZIP)