mismath (27feb24)

git-svn-id: svn://tug.org/texlive/trunk@70201 c570f23f-e606-0410-a88d-b1316a301751

4 files changed, 456 insertions, 179 deletions

diff --git a/Master/texmf-dist/doc/latex/mismath/mismath.pdf b/Master/texmf-dist/doc/latex/mismath/mismath.pdf
index 6bd776ce783..d8af34d81f5 100644
--- a/Master/texmf-dist/doc/latex/mismath/mismath.pdf
+++ b/Master/texmf-dist/doc/latex/mismath/mismath.pdf
diff --git a/Master/texmf-dist/source/latex/mismath/mismath.dtx b/Master/texmf-dist/source/latex/mismath/mismath.dtx
index b40e0d7211b..f69aaeaffe0 100644
--- a/Master/texmf-dist/source/latex/mismath/mismath.dtx
+++ b/Master/texmf-dist/source/latex/mismath/mismath.dtx
@@ -20,18 +20,18 @@
 %<*package> 
 \NeedsTeXFormat{LaTeX2e}[2005/12/01]
 \ProvidesPackage{mismath}   
-    [2024/02/20 v2.10 .dtx Miscellaneous mathematical macros]
+    [2024/02/26 v2.11 .dtx Miscellaneous mathematical macros]
 %</package>
 %<*driver>
 \documentclass{ltxdoc}
-\usepackage[utf8]{inputenc}
+%\usepackage[utf8]{inputenc} % running through XeLaTeX
 \usepackage[T1]{fontenc}
 \usepackage[english]{babel}
-\usepackage[charter]{mathdesign} % in case of font change, modify 2.1 (3rd §)
-\usepackage[ibrackets]{mismath}
-%\usepackage{amssymb} incompatible with mathdesign
+\usepackage{fontspec}
+\usepackage{fourier} % in case of font change, modify 2.1 (3rd §)
+\usepackage[ibrackets,decimalcomma]{mismath}
+%\usepackage{amssymb} % unnecessary with fourier
 \usepackage{multicol}
-\usepackage[Symbol]{upgreek}
 \usepackage{sectsty}
 \usepackage{xcolor}
 \usepackage{spacingtricks}
@@ -40,12 +40,26 @@
 
 \definecolor{darkbrown}{rgb}{0.5,0.1,0.1}
 \allsectionsfont{\color{darkbrown}}
-\MathUp{i} \pinumber[piup]
-% I need italicized e in vectors section
-% For using in this doc only:
-\usepackage[LGR,T1]{fontenc}
-\DeclareSymbolFont{UpGr}{LGR}{lmr}{m}{n}
-\DeclareMathSymbol{\mypi}\mathalpha{UpGr}{"70}
+% The following commands provides several shapes of pi
+% the maximum number of authorized math fonts is reached
+\DeclareFontEncoding{LGR}{}{}
+\DeclareSymbolFont{lgrlmr}{LGR}{lmr}{m}{n}
+\DeclareMathSymbol{\pilmr}{\mathalpha}{lgrlmr}{112}
+\DeclareSymbolFont{lgrAlegreya}{LGR}{Alegreya-LF}{m}{n}
+\DeclareMathSymbol{\piAlegreya}{\mathalpha}{lgrAlegreya}{112}
+\DeclareSymbolFont{lgrCochineal}{LGR}{Cochineal-LF}{m}{n}
+\DeclareMathSymbol{\piCochineal}{\mathalpha}{lgrCochineal}{112}
+\pinumber[upgreek=Euler]
+\DeclareSymbolFont{upgreekSymbol}{U}{psy}{m}{n}
+\DeclareMathSymbol{\piSymbol}{\mathord}{upgreekSymbol}{`p}
+\DeclareSymbolFont{mdCharter}{OML}{mdbch}{m}{n}
+\DeclareMathSymbol{\piCharter}{\mathord}{mdCharter}{"19}
+\DeclareSymbolFont{kp}{U}{jkpmia}{m}{it}
+\DeclareMathSymbol{\pikp}{\mathord}{kp}{"19}
+\DeclareSymbolFont{px}{U}{pxmia}{m}{it}
+\DeclareMathSymbol{\pipx}{\mathord}{px}{"19}
+\DeclareSymbolFont{tx}{U}{txmia}{m}{it}
+\DeclareMathSymbol{\pitx}{\mathord}{tx}{"19}
 % For showing original \i and \j in text mode:
 \DeclareTextFontCommand{\extrafont}{\fontfamily{lmr}\selectfont}
 
@@ -69,7 +83,7 @@
 %</driver>
 % \fi
 %
-% \CheckSum{691}
+% \CheckSum{807}
 %
 % \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
@@ -143,10 +157,10 @@
 %    - default option (in upgreek) changed from Symbol to Euler.}
 %
 % \changes{v2.0}{2022/11/11}{
-%    - pinumber command has been improved to use other Greek letter packages,
+%    - pinumber command has been improved to use other Greek letters packages,
 %        (and LGR encoding pi by default), it is no longer compatible with the older, 
 %    - paren command has been removed, 
-%    - hvect and hlbar have been slighlty modified (phantom t instead of phantom h),
+%    - hvect and hlbar have been slightly modified (phantom t instead of phantom h),
 %    - several changes in documentation, 
 %    - now using the Charter font (with the package mathdesign)}
 %
@@ -182,7 +196,7 @@
 %
 % \changes{v2.6}{2023/03/01}{
 %    - A bug correction in mm@macro
-%    - incompatibility of \C macro solved, when using babel with russian
+%    - incompatibility of \C macro solved, when using babel with Russian
 %        (thanks to Murray Eisenberg for this bug report on TeX StackExchange)
 %    - mathrm added in macro eqdef* (useful if italicized Greek uppercase Delta)
 %    - Tiny changes in the documentation}
@@ -206,36 +220,41 @@
 %        for the options ibrackets, decimalcomma and the commands MathUp, MathIt
 %    - Explicit error message when using mathcols without loading the multicol package} 
 %
+% \changes{v2.11}{2024/02/22}{
+%    - Enhancements of the pinumber macro with keyval options:
+%        * no necessity to load a Greek letters package
+%        * improvements of compatibility with unicode-math}
+%
 % \GetFileInfo{mismath.sty}
 %
-% \title{\textsf{mismath}\\ Miscellaneous mathematical macros\thanks{This document
+% \title{Miscellaneous mathematical macros \\The \textsf{mismath} package\thanks{This document
 % corresponds to \textsf{mismath}~\fileversion, dated \filedate. 
 % Thanks to François Bastouil for initial help in English translation.}}
 % \author{Antoine Missier \\ \texttt{antoine.missier@ac-toulouse.fr}}
-% \date{February 20, 2024}
+% \date{February 26, 2024}
 %
 % \maketitle
 % \tableofcontents
 %
 % \section{Introduction}
 %
-% According to the International Standards ISO~31-0:1992 to ISO~31-13:1992, 
-% superseded by ISO~80000-2:2009, mathematical constants $\e$, $\i$, $\pi$ 
-% should be typeset in roman (upright shape) and not in italic (sloping shape) like
+% According to the International Standards ISO~31-0:1992 to ISO~31-13:1992 
+% (superseded by ISO~80000-2:2009), mathematical \emph{constants} $\e$, $\i$, $\otherpi$ 
+% should be typeset in roman (upright shape) and not in italic like
 % variables (see~\cite{TYPMA}~\cite{NIST}~\cite{SI}~\cite{ICTNS}).
 % This package provides some tools to achieve this automatically.
 %
 % \medskip
 % Even though it is recommended to typeset vectors names 
 % in bold italic style~\cite{NIST}~\cite{ICTNS}, 
-% they are often represented with arrows 
-% (especially in school documents or in physics). 
-% To draw visually appealing arrows above vectors, we use the \textsf{esvect} package 
+% they are often represented with arrows,
+% especially in school documents or in physics. 
+% To draw nice arrows above vectors, we use the \textsf{esvect} package 
 % by Eddie Saudrais~\cite{VECT}.
 % Additionally we provide a few more macros related to vectors with arrows, 
 % particularly to enhance the typesetting of the norm: $\norm{\vect{AB}}$ 
-% instead of \LaTeX\ version $\lVert\vect{AB}\rVert$ which is not vertically adjusted,
-% or worse $\left\Vert \vect{AB} \right\Vert$.
+% instead of the \LaTeX\ version $\lVert\vect{AB}\rVert$, which is not vertically adjusted,
+% or worse $\left\Vert \vect{AB} \right\Vert$ (when using |\left|\ldots |\right|).
 % 
 % \smallskip
 % The package also offers other macros for:
@@ -286,7 +305,9 @@
 % are required to be typeset in upright shape
 % \footnote{The \textsf{frenchmath} package~\cite{FR}
 % ensures to follow the recommended French rules.}.
-% ^^A The decision to load any of these packages is left to the user's discretion.
+% When running through \LuaLaTeX\ or \XeLaTeX\ you can also get this result by 
+% setting the option \mbox{\texttt{math-style=ISO}} in the \textsf{unicode-math} package.
+% 
 %
 % \section{Usage}
 %
@@ -295,9 +316,9 @@
 % \DescribeMacro{\mathup} 
 % As for classic functions identifiers, \emph{predefined} mathematical constants
 % should be typeset in upright shape (typically in roman family), 
-% even though this practice is not very common and can be tedious
-% to adhere to. A first solution is to use the |\mathup| macro, 
-% which is superior to |\mathrm|
+% but this practice is not sufficiently respected, probably because it's a bit tedious. 
+% A first solution is to use the |\mathup| macro, 
+% which is preferable to |\mathrm|
 % \footnote{The \texttt{\string \mathup} macro is based on \texttt{\string \operatorfont}, 
 % which comes from the
 % \textsf{amsopn} package, automatically loaded by \textsf{amsmath}. 
@@ -307,7 +328,7 @@
 % a better choice in \textsf{beamer} presentations to ensure that mathematical 
 % constants are typeset in upright shape and consistent 
 % with the default sans serif math font.},
-% for setting any math text in upright shape. For example you can use
+% for setting any group of letters in roman. For example you can use
 % |\mathup{e}| to get the Euler's number.
 %
 % \medskip
@@ -317,7 +338,8 @@
 % the package provides the |\e| command for Euler’s number 
 % and |\i| or |\j| for imaginary numbers.
 % Let us notice that |\i| and |\j| already exist in LaTeX. In LR (left-to-right) mode, 
-% they produce `\extrafont{\i,\ \j}' without the dot, allowing you to place accents on them. 
+% they produce \mbox{`\extrafont{\i,\ \j}'} without the dot,  
+% allowing you to place accents on them. 
 % However, in mathematical mode, they produce the warning 
 % ``\texttt{LaTeX Warning: Command \string \i\space invalid in math mode on input line}
 % \meta{line}''. 
@@ -328,7 +350,8 @@
 % \DescribeMacro{\MathUp} 
 % Indeed, typing a lot of backslashes for constants like $\e$, $\i$, or $\j$
 % in a document with numerous formulas can become tiresome. 
-% To alleviate this, the package proposes a powerful solution with the macro |\MathUp|\marg{char}.
+% To alleviate this, the package proposes a powerful solution 
+% with the macro |\MathUp|\marg{char}.
 % For example, when |\MathUp{e}| is called, any subsequent occurrence of $\e$
 % will automatically be set in roman (upright shape), 
 % without the need to type |\e| explicitly. The effect of this macro 
@@ -343,8 +366,8 @@
 %
 % \medskip
 % \DescribeMacro{\MathIt}
-% When there are other occurrences of $\mathit{e}$, $\mathit{i}$ or $j$ as variables, 
-% you can still obtain italicized $\mathit{e}$, $\mathit{i}$ or $\mathit{j}$ using \LaTeX\
+% When there are other occurrences of $e$, $i$ or $j$ as variables, 
+% you can still obtain italicized $e$, $i$ or $j$ using \LaTeX\
 % commands |\mathit| or |\mathnormal|, which are useful for a single use. 
 % However, you also have the option to use the inverse switch |\MathIt|\marg{char},
 % which has a global effect when used outside environments or braces, 
@@ -365,17 +388,23 @@
 % at once using |\MathNormal|.
 % 
 % \medskip
-% \DescribeMacro{\pinumber[\meta{command}]}
-% The mathematical constant $\pi$  should also be typeset in upright shape 
+% \DescribeMacro{\pinumber[\meta{option}]}
+% The mathematical constant $\otherpi$  should also be typeset in upright shape 
 % (see~\cite{TYPMA}, \cite{NIST}, \cite{ICTNS}), which is different from italicized $\itpi$. 
 % However, this recommendation is even less commonly followed compared to the one 
 % concerning  $\e$ and $\i$~\cite{TYPMA}.
-% Several packages enable the typesetting of mathematical Greek letters in upright shape. 
-% Notably, let us mention \textsf{upgreek}~\cite{GREEK}, \textsf{mathdesign}~\cite{DESIGN} 
-% (used in the present document), \mbox{\textsf{kpfonts}}~\cite{KPF}, 
-% \textsf{fourier}~\cite{FOUR},
-% \textsf{libertinust1math},
-% \textsf{pxgreeks}, \textsf{txgreeks}
+% The |\pinumber| command replaces the italic $\itpi$ with an upright $\otherpi$
+% each time |\pi| is called. It functions in two different ways.
+%
+% \begin{enumerate}
+% \item You can install a Greek letters package that provides the glyphs in upright shape. 
+% There are many available.
+% Notably, let us mention \textsf{upgreek}~\cite{GREEK}, 
+% \mbox{\textsf{mathdesign}}~\cite{DESIGN},
+% \mbox{\textsf{kpfonts}}~\cite{KPF}, 
+% \mbox{\textsf{fourier}}~\cite{FOUR} (used in the present document),
+% \mbox{\textsf{libertinust1math}},
+% \mbox{\textsf{pxgreeks}}, \mbox{\textsf{txgreeks}}
 % \footnote{When using \textsf{pxgreeks} or \textsf{txgreeks},
 % they should be loaded \emph{after} \textsf{mismath} to avoid an error
 % due to conflict with the existing macros \texttt{\string\iint}, \texttt{\string\iiint},
@@ -386,52 +415,115 @@
 % These packages provide commands like |\uppi| (\textsf{upgreek}), 
 % |\piup| (\textsf{mathdesign}, \textsf{kpfonts}, \textsf{lgrmath}), 
 % |\otherpi| (\textsf{fourier}), etc.
-% \footnote{They also have options to typeset all the Greek lowercase 
+% \footnote{They have also options to typeset all the Greek lowercase 
 % letters in upright shape by default, but this in not our goal here.}
-% To preserve default italic style for lowercase Greek letters,
-% with the exception of pi, and to
-% avoid the need to type a lot of |\uppi| or |\piup|, we offer the 
-% macro |\pinumber|[\meta{command}].
-% This macro redefines |\pi| to match
-% the optional command  name provided (without a backslash), such as |piup|, 
-% assuming that the appropriate package has been loaded beforehand
-% \footnote{The macro \texttt{\string \pinumber} doesn't work with   
-% \textsf{unicode-math}, but, with this package, you can use \texttt{\string \uppi} instead
-% (or set all greek lowercase letters in upright shape with the option 
-% \texttt{math-style=french}).}.
-%
-% By using the preliminary code |\MathNumbers{ei}\pinumber[piup]| 
-% (assuming the \textsf{mathdesign} package is loaded)
+%
+% In this case, |\pinumber| must be called in the preamble 
+% with the name of the command (without the backslash) giving access to the upright pi
+% (piup, uppi, otherpi \ldots) as the argument for the optional parameter.
+% However, installing such a Greek letters package will modify 
+% all the other Greek letter glyphs.
+% ^^A even if, except for pi, they will be in italics. 
+%
+% By using the preliminary code |\MathNumbers{ei}\pinumber[otherpi]| 
+% (assuming the \textsf{fourier} package is loaded)
 % you can achieve the following result:
 % \begin{center}
-% |$e^{i\pi} = -1$| \quad which yields \quad   $\e^{i\pi}=-1$.
+% |$e^{i\pi} = -1$| \quad yields \quad   $\e^{\i\otherpi}=-1$.
+% \end{center}
+%
+% \item Without installing a package, it is possible to change only the glyph of pi 
+% without altering the original glyphs for the other Greek letters, 
+% which are typically in italics. 
+% ^^A The original pi will still be accessible with |\itpi|.
+%
+% In this case, |\pinumber| must be called in the preamble with an optional argument 
+% of the \texttt{key=value} type. The key name corresponds to a package
+% providing the same glyph.
+% When a key is given without a value, |\pinumber| will choose a default value
+% specified below (depending on the key) . 
+% The following table summarizes the available options.
+%
+% \begin{center}
+% \setlength{\extrarowheight}{1pt}
+% \begin{tabular}{>{\ttfamily}l>{$}c<{$}}
+% \hline
+% \normalfont Option & \mbox{Result} \\
+% \hline
+% lgrmath=lmr & \pilmr \\
+% lgrmath=Alegreya-LF & \piAlegreya \\
+% lgrmath=Cochineal-LF & \piCochineal \\
+% lgrmath=\ldots & \ldots\\
+% upgreek=Euler & \pi \\
+% upgreek=Symbol & \piSymbol \\
+% \hline
+% \end{tabular}
+% \qquad 
+% \begin{tabular}{>{\ttfamily}l>{$}c<{$}}
+% \hline
+% \normalfont Option & \mbox{Result} \\
+% \hline
+% mathdesign & \piCharter \\
+% fourier &  \otherpi\\
+% kpfonts & \pikp \\
+% pxfonts & \pipx \\
+% txfonts & \pitx \\
+% & \\
+% \hline
+% \end{tabular}
 % \end{center}
 %
-% When you call |\pinumber| without any argument,
-% it defines |\pi| using the default LGR font encoding for Greek letters,
-% resulting in the character $\mypi$. In this case the appropriate option \texttt{LGR}
-% for the \textsf{fontenc} package will be automatically loaded
-% if the |\pinumber| command is called in the preamble (at least the first time it is used). 
-% The pi character obtained with this setting will look the same as the one provided by
-% Günter Milde's \textsf{textalpha} package~\cite{ALPHA}.
-% This $\mypi$ character is particularly well-suited
-% for use with the default Computer Modern or Latin Modern font family
-% \footnote{This default $\mypi$ character may not always fit well with various text fonts, 
-% especially those that are bolder or different from the default Computer Modern font.
-% The \textsf{upgreek} package~\cite{GREEK} provides a better $\uppi$ character 
-% with the Symbol option, utilizing the Adobe Symbol font. This $\uppi$ character 
-% matches well with several text fonts, such as Times.}.
+% \begin{itemize}
+% \item With the \texttt{lgrmath} key, we actually have numerous possibilities 
+% for values (any Greek letters math fonts in LGR encoding). 
+% The documentation of the \textsf{lgrmath}
+% package explains how to check an visualize all available fonts on your distribution.
+% We have only presented three of them. The default value is \texttt{lmr}.
+%
+% \item With the \texttt{upgreek} key, the default value is \texttt{Symbol}. 
+% There is a third possible value, \texttt{Symbolsmallscale}, 
+% which provides the same character as \texttt{Symbol} but reduced in size by 10\,\%.
+%
+% \item With the \texttt{mathdesign} key, there are actually 3 possible values: 
+% \texttt{Utopia}, \texttt{Garamond}, or \texttt{Charter} (default value), 
+% but the glyphs obtained for pi look very similar.
+%
+% \item With the \texttt{kpfonts} key, we have two possible values: 
+% \texttt{normal} (default) and \texttt{light}. The option \texttt{kpfonts=light}
+% provides a slightly less bold character.
+%
+% \item The keys \texttt{pxfonts} (based on Palatino) and \texttt{txfonts} (based on Times)
+% are booleans whose default value is \texttt{true} (when called).
+%
+% \item When |\pinumber| is called without an argument in the preamble, 
+% it corresponds to the option \texttt{lgrmath=lmr}.
+% This $\pilmr$ character is particularly well-suited
+% for use with the default Computer Modern or Latin Modern font family.
+% \footnote{It will look the same as the one provided by
+% Günter Milde's \textsf{textalpha} package~\cite{ALPHA}.}.
+% \end{itemize}
+% \end{enumerate}
+% 
+% If \textsf{unicode-math} is used (which provides |\uppi|), the command |\pinumber[uppi]|
+% will not work, and it can be quite complicated to make some Greek letters packages work. 
+% In any case, this package must be loaded after \textsf{unicode-math} and in 
+% |\AtBeginDocument|. 
+% However, \textsf{unicode-math} supports |\pinumber| very well with the 
+% previous key=value options, by calling |\pinumber[option]| after 
+% \mbox{\textsf{unicode-math}}.
 %
 % \medskip
 % \DescribeMacro{\itpi}
 % When you activate |\pinumber|, the original italic $\itpi$ 
 % is still accessible using |\itpi|.
 %
+% \medskip
 % \DescribeMacro{\pinormal}
-% In fact |\pinumber| acts as a switch, enabling the upright $\pi$.
-% Additionally, there is an inverse switch, 
-% |\pinormal|, which you can call anywhere to revert to the original behavior
-% of the |\pi| command (italic $\itpi$).
+% In fact, |\pinumber| is a toggle, with its inverse toggle being |\pinormal|. 
+% The latter restores the |\pi| command to its default behavior. 
+% Thus, |\pinumber| can be used anywhere in the document (like |\pinormal|), 
+% but then without arguments and provided it has been initially called in the preamble,
+% according to the procedures outlined above.
 %
 % \subsection{Vectors (and tensors)}
 %
@@ -532,22 +624,22 @@
 % (or |\|$\mid$ unless a plus (+) or minus (-) sign follows the opening delimiter)
 % or |\left\Vert| and |\right\Vert| 
 % for adaptive delimiters. Unfortunately, these delimiters 
-% are always vertically centered, relatively to the middle of the base line, 
+% are always vertically centered, relatively to the mathematical center line, 
 % whereas vectors with arrows are asymmetric objects.
 % The code |$\norm{\vec{h}}$| raises a smaller double bar to produce $\norm{\vec{h}}$
-% instead of $\left\Vert \vec{h} \right\Vert$.
+% instead of $\Vert\vec{h}\Vert$ or $\left\Vert \vec{h} \right\Vert$.
 % Let's notice that the height of the bars don't adjust to content, 
 % but however to context: main text, subscripts or exponents, 
 % \eg $\e^{\norm{\vec{h}}}$. 
 % This macro is useful only for arguments of special height, such as $\vec{h}$ or $\vect{AB}$
 % and may give bad results in other situations.
 %
-% \medskip
+% \pagebreak
 % \DescribeMacro{\mathbfsfit}\DescribeMacro{\tensor}
 % For tensors symbols, ISO rules recommend using
 % sans serif bold italic, but there
-% is no such math alphabet in the default \TeX\  mathematical style.
-% However, the \textsf{mismath} package defines this alphabet 
+% is no such math alphabet in the default \LaTeX\  mathematical style.
+% However, the \mbox{\textsf{mismath}} package defines this alphabet 
 % (assuming the font encoding and package you use permits it) 
 % and provides the macro |\mathbfsfit| or its alias |\tensor|.
 % By using |\tensor{T}| you can produce $\tensor{T}$.
@@ -590,6 +682,7 @@
 % in roman just like any standard function identifier.
 % This can be achieved with |\P| and |\E| commands.
 %
+% \medskip
 % \DescribeMacro{\Par}
 % The |\P| command already existed to refer to the end of paragraph symbol \Par\ 
 % and has been redefined, but this symbol can still be obtained with |\Par|.
@@ -599,11 +692,12 @@
 % Variance is generally denoted by $\var$ or $\Var$ (see table below),
 % but some authors prefer to use $\V$, which can be produced using |\V|.
 %
+% \medskip
 % \DescribeMacro{\MathProba}\DescribeMacro{\MathNormal}
-% In the same way as for $\e$, $\i$ or $\j$, you can use |\MathUp{P}|, |\MathUp{E}| 
+% As for $\e$, $\i$ or $\j$, you can use |\MathUp{P}|, |\MathUp{E}| 
 % or |\MathUp{V}| to avoid typing many |\P|, |\E| or |\V|. 
 % However you can also achieve this in a single command with |\MathProba|, 
-% for example |\MathProba{P,E}|. We get the inverse switch with
+% for example |\MathProba{P,E}|. We get the inverse toggle with
 % |\MathIt| for any individual letter or |\MathNormal| for a list.
 %
 % \medskip
@@ -614,7 +708,7 @@
 % For instance |\renewcommand\probastyle{\mathbb}|
 % \footnote{The effect of this redefinition is global or local to the container environment 
 % in which it is used.}
-% brings the previous ``openwork'' letters.
+% brings the previous ``double-struck'' letters.
 % The |\mathbb| command comes from \textsf{amsfonts} package
 % (loaded by \textsf{amssymb} but also available standalone)
 % which needs to be called in the preamble.
@@ -679,17 +773,20 @@
 %
 % \subsection{A few useful aliases} \label{aliases}
 % 
+% \onlymathC
 % In the tradition of Bourbaki and D.~Knuth, proper use requires 
 % that classic sets of numbers are typeset in bold roman:
 % $\R, \C, \Z, \N, \Q$, 
-% whereas ``openwork'' letters ($\mathbb{R}, \mathbb{Z}, \ldots$) 
+% whereas ``double-barred'' or ``openwork'' letters 
+% ($\mathbb{R}, \mathbb{C}, \mathbb{Z}, \ldots$) 
 % are reserved for writing at the blackboard~\cite{LSHORT}.
 % Similarly, to designate a field we use $\F$ or $\K$ (Körper in German).
-% We get obtain these symbols with the following macros:
+% We obtain these symbols with the following macros:
 % \begin{center}
 % |\R|, |\C|, |\Z|, |\N|, |\Q|, |\F|, |\K|.
 % \end{center}
 %
+% \medskip
 % \DescribeMacro{\mathset}
 % The |\mathset| command enables you to change the behavior 
 % of all these macros in a global way. 
@@ -776,13 +873,13 @@
 % of the \texttt{\string \underbrace} command, along with many other useful macros.
 % It is loaded by \textsf{mismath}.}, 
 % making source code more compact.\\[2ex]
-% \begin{minipage}{6.8cm}
+% \begin{minipage}{6.4cm}
 % \begin{verbatim}
 %\[ (QAP)^n = \unbr{QAP\mul QAP\mul
 %   \cdots\mul QAP}_{n\text{ times}} \]
 % \end{verbatim}
 % \end{minipage}
-% \begin{minipage}{6.2cm}\vspace{-3ex}
+% \begin{minipage}{6cm}\vspace{-3ex}
 % \[ (QAP)^n = \unbr{QAP\mul QAP\mul\cdots\mul QAP}_{n\text{ times}} \]
 % \end{minipage}
 %
@@ -850,8 +947,8 @@
 % For bars whose height has to adapt to the content, 
 % we can use |\left\vert| \ldots |\right\vert| or, more simply, 
 % the |\abs|\{\ldots\} command, which is equivalent
-% \footnote{Another solution is to define \texttt{\string \abs} 
-% using the \texttt{\string \DeclarePairedDelimiter} command 
+% \footnote{We could also define \texttt{\string \abs} 
+% using \texttt{\string \DeclarePairedDelimiter} 
 % from the \mbox{\textsf{mathtools}} package~\cite{TOOL}.}.
 %
 % \medskip
@@ -876,8 +973,8 @@
 % In that specific case, the space around the square brackets is often inappropriate, 
 % as in the expression $x \in \mathclose{]} 0, +\infty[$.
 % To address this issue, we have redefined the brackets in the \textsf{ibrackets}
-% package~\cite{BRACKET} 
-% which can be optionally
+% package~\cite{BRACKET}.
+% This one can be optionally
 % \footnote{This functionality is optional because there is a conflict
 % when using another command for open intervals with square brackets defined by 
 % \texttt{\string \DeclarePairedDelimiter} from \textsf{mathtools}~\cite{TOOL}.}
@@ -885,9 +982,10 @@
 % Thus |$x\in ]-\pi,0[ \cup ]2\pi,3\pi[$|
 % \begin{align*}
 % \mbox{yields \ } 
-% x\in ]-\pi, 0[ \cup ]2\pi, 3\pi[ & \mbox{\ with \textsf{ibrackets}}, \\
+% x\in ]-\otherpi, 0[ \cup ]2\otherpi, 3\otherpi[ & \mbox{\ with \textsf{ibrackets}}, \\
 % \mbox{instead of \ }
-% x\in \mathclose{]}-\pi, 0 \mathopen{[} \cup \mathclose{]} 2\pi, 3\pi \mathopen{[} 
+% x\in \mathclose{]}-\otherpi, 0 \mathopen{[} \cup 
+% \mathclose{]} 2\otherpi, 3\otherpi \mathopen{[} 
 % &\mbox{\ without \textsf{ibrackets}}.
 % \end{align*}
 %
@@ -907,7 +1005,7 @@
 % Conversely, when dealing with algebraic expressions involving intervals,
 % \emph{you must leave a blank space between the second bracket and the} +/- 
 % \emph{operation}.
-% For instance |$[a,b] + [c,d]$| yields $[a,b] + [c,d]$
+% For instance |$[a,b] +[c,d]$| yields $[a,b] +[c,d]$
 % but |$[a,b]+ [c,d]$| yields $[a, b]+ [c, d]$.
 %
 % Besides, there are other approaches, for example the |\interval| macro
@@ -931,7 +1029,7 @@
 % \textsf{ncccomma} by Alexander I.~Rozhenko~\cite{NCC}.
 % The second package takes a more generic approach,
 % however it poses several compatibility issues, 
-% in particular when compiling with Lua\LaTeX, using \textsf{unicode-math}
+% in particular when running through Lua\LaTeX, using \textsf{unicode-math}
 % and calling |\setmathfont|.
 % Therefore we propose the \textsf{decimalcomma} package~\cite{DEC},
 % functionally identical to that of \textsf{ncccomma} but with lighter code 
@@ -961,13 +1059,13 @@
 % This first example could also have been achieved using the \texttt{cases} environment
 % from the \textsf{amsmath} package, although \texttt{cases} places mathematical expressions 
 % closer to the bracket.
-% The |\systemsep| command allows you to adjust the gap between 
+% The |\systemsep| length allows you to adjust the gap between 
 % the bracket and the expressions. 
-% By default, the gap is set to |\medspace|. You can reduce the gap by redefining the command,
-% for instance: |\renewcommand{\systemsep}{\thinspace}|.
+% By default, the gap is set to |\medspace|. You can reduce this gap by redefining 
+% the command, \eg: |\renewcommand{\systemsep}{\thinspace}|.
 % Alternatively you can increase the gap using |\thickspace| 
-% (and with |\renewcommand\systemsep}{}| you can achieve the same spacing as the
-% \texttt{cases} environment).
+% and the same spacing as of the \texttt{cases} environment 
+% is obtained with |\renewcommand\systemsep}{}|.
 % The |\systemsep| command allows for greater flexibility in adjusting the spacing 
 % within the \texttt{system} environment.
 %
@@ -1108,16 +1206,17 @@
 % |\enumber| & |\MathUp{e}| \\
 % |\inumber| & |\MathUp{i}| \\
 % |\jnumber| & |\MathUp{j}| \\
-% |\PEupright| & |\MathUp{P}\MathUp{E}| \\
+% |\PEupright| & |\MathProba{PE}| \\
 % \hline
 % \end{tabular}
 % \end{center}
 %
 % \medskip
-% You can also utilize|\MathNumbers| instead of |\MathUp| with an argument containing
+% You can also utilize |\MathNumbers| instead of |\MathUp| with an argument containing
 % all the constants you want to be typeset in roman (among `e, i, j').
-% Additionally |\MathProba{P,E}| can be used instead of |\MathUp{P}\MathUp{E}|,
-% and you can include V in its argument to refer to variance.
+%
+% Additionally you can include V in the argument of |\MathProba| to refer to variance,
+% (or even use |\MathUp{P}\MathUp{E}|).
 %
 % \medskip
 % In version 2.3 we attempted to replace these old commands
@@ -1143,19 +1242,20 @@
 \@ifpackageloaded{mathtools}{}{\RequirePackage{mathtools}}
 \@ifpackageloaded{esvect}{}{\RequirePackage[b]{esvect}}
 \RequirePackage{ifthen}
-\RequirePackage{xparse} % provides \NewDocumentCommand
+%\RequirePackage{xparse} % provides \NewDocumentCommand, now in LaTeX3
 \RequirePackage{xspace}
 \RequirePackage{iftex}
 \RequirePackage{etoolbox} % provides \AtEndPreamble
+\RequirePackage{xkeyval}
 
 %    \end{macrocode}
 %
 % The package \textsf{unicode-math} causes some compatibility issues
-% with the options ibrackets or decimalcomma: the respective packages
+% with the options \texttt{ibrackets} or \texttt{decimalcomma}: the respective packages
 % must be loaded \emph{after} \textsf{unicode-math},
 % but \textsf{mismath} (like \textsf{amsmath}) must be loaded \emph{before} 
 % \textsf{unicode-math}.
-% And to complicate matters, \textsf{unicode-math} defines (or redefines) all its commands 
+% And to complicate matters, \textsf{unicode-math} defines all its commands 
 % by |\AtBeginDocument|.
 % Therefore we used the command |\AtBeginDocument| within
 % |\AtEndPreamble| (from the \textsf{etoolbox} package).
@@ -1413,58 +1513,151 @@
 \newcommand{\PEupright}{
     \PackageWarning{mismath}{Old command \string\PEupright\space
         is used. \MessageBreak
-        It can be replaced by \string\MathUp{P}\space 
-        and \string\MathUp{E}}
+        It can be replaced by \string\MathProba{PE}}
     \MathUp{P}\MathUp{E}
 }
 
 %    \end{macrocode}
 %
-% Obtaining an upright Greek letter $\pi$ must be handled differently. 
-% The switches are called |\pinumber| and |\pinormal|.
-% When given without an argument, |\pinumber| uses the LGR font encoding.
-% A particularity of the \textsf{fontenc} package is that it can be loaded 
-% several times with different options without triggering an ``option clash'' error.
-% This macro doesn't work with \textsf{unicode-math}, which provides
-% the |\uppi| command but it cannot be redefined in |\pi|.
+% Obtaining an upright Greek letter $\otherpi$ must be handled differently. 
+% The switches are called |\pinumber| and |\pinormal| 
+% and can be used anywhere in the document.
+%
+% But |\pinumber| must be called first in the preamble with an optional argument.
+% This argument can be a valid command name that produces an upright pi letter
+% (after having loading an appropriate package).
+% When given without an argument in the preamble, 
+% |\pinumber| uses an LGR font encoding called \texttt{lmr}.
+% A new feature (v2.11) is to use |\pinumber| with a keyval option to 
+% use many other Greek pi letters without loading
+% a whole package, thus without altering the other (italic) Greek letters. 
+% We achieve this with |\DeclareSymbolFont| and |\DeclareMathSymbol|.
+% We just have to know the ``name'' of the desired symbol font.
+% Compatibility with \textsf{unicode-math} is a bit tricky!
+% 
 % \medskip
 %    \begin{macrocode}
-\newcommand*\pinumber[1][]{
-    \ifmm@unicodemath
-        \PackageError{mismath}{Command \string\pinumber\space 
-            is incompatible with unicode-math. \MessageBreak
-            Use \string\uppi\space to get the upright pi}{}
-    \fi
-    \@ifundefined{itpi}{\let\itpi\pi}{}
-    \ifthenelse{\equal{#1}{}}{
+\newif\ifmm@lgr
+\define@cmdkey{pinumber}[mm@]{lgrmath}[lmr]{\mm@lgrtrue}
+\newif\ifmm@upgreek
+\define@choicekey{pinumber}{upgreek}[\mm@upgreek@option]%
+  {Euler,Symbol,Symbolsmallscale}[Symbol]{\mm@upgreektrue}
+\newif\ifmm@mathdesign
+\define@choicekey{pinumber}{mathdesign}[\mm@mathdesign@option]%
+  {Utopia,Garamond,Charter}[Charter]{\mm@mathdesigntrue}
+\define@boolkey{pinumber}[mm@]{fourier}[true]{}
+\newif\ifmm@kpfonts
+\define@choicekey{pinumber}{kpfonts}[\mm@kp@option]%
+  {normal,light}[normal]{\mm@kpfontstrue}
+\define@boolkey{pinumber}[mm@]{pxfonts}[true]{}
+\define@boolkey{pinumber}[mm@]{txfonts}[true]{}
+  
+\newcommand*\pinumber[1][]{%
+    \ifthenelse{\equal{#1}{}}{% no argument given
       \ifx\@onlypreamble\@notprerr % not in preamble
         \@ifundefined{savedpi}{
             \PackageWarning{mismath}{%
-                \string\pinumber\space without argument\MessageBreak
-                must be used in the preamble first\MessageBreak
-                to load LGR fontenc for upright pi}
+                \string\pinumber\space 
+                must be used in the preamble first}
         }{\let\pi\savedpi}
       \else % in the preamble
-        \RequirePackage[LGR,T1]{fontenc}
-        \DeclareSymbolFont{UpGr}{LGR}{lmr}{m}{n}
-        \let\pi\relax 
-        \DeclareMathSymbol{\pi}\mathalpha{UpGr}{"70}
-        \let\savedpi\pi
+        \AtBeginDocument{\let\itpi\pi}% must be here with unicode-math
+        \AtEndPreamble{\AtBeginDocument{
+          %\let\itpi\pi
+          \let\pi\relax
+          \DeclareFontEncoding{LGR}{}{}
+          \DeclareSymbolFont{mm@grup}{LGR}{lmr}{m}{n}
+          \DeclareMathSymbol{\pi}\mathalpha{mm@grup}{"70}
+          \let\savedpi\pi
+        }}
       \fi
-    }{
-      \@ifundefined{#1}{
-          \PackageWarning{mismath}{%
-              #1 must be a valid command name\MessageBreak 
-              for pinumber, but command \bslash #1
-              is undefined.\MessageBreak
-              Perhaps a missing package}
-      }{\renewcommand{\pi}{% 
-          \csname #1\endcsname}
-      }
+    }{% command name or keyval options, necessarily in the preamble
+      \AtBeginDocument{\let\itpi\pi}% must be here with unicode-math
+      \AtEndPreamble{\AtBeginDocument{
+        \@ifundefined{#1}{% 
+          \setkeys{pinumber}{#1}
+          \let\pi\relax
+          \ifmm@lgr
+            \DeclareFontEncoding{LGR}{}{}
+            \DeclareSymbolFont{mm@grup}{LGR}{\mm@lgrmath}{m}{n}
+            % may work with bold (b) instead of m
+            \DeclareMathSymbol{\pi}{\mathalpha}{mm@grup}{112}
+          
+          \else\ifmm@upgreek         
+          \ifdefstring{\mm@upgreek@option}{Euler}{
+            \DeclareFontFamily{U}{eur}{\skewchar\font'177}
+            \DeclareFontShape{U}{eur}{m}{n}{%
+              <-6> eurm5 <6-8> eurm7 <8-> eurm10}{}
+            \DeclareFontShape{U}{eur}{b}{n}{%
+              <-6> eurb5 <6-8> eurb7 <8-> eurb10}{}
+            \DeclareSymbolFont{mm@grup}{U}{eur}{m}{n}
+            \DeclareMathSymbol{\pi}{\mathord}{mm@grup}{"19} % 25
+          }{
+          \ifdefstring{\mm@upgreek@option}{Symbol}{
+            \DeclareSymbolFont{mm@grup}{U}{psy}{m}{n}
+            \DeclareMathSymbol{\pi}{\mathord}{mm@grup}{`p}
+          }{
+          \ifdefstring{\mm@upgreek@option}{Symbolsmallscale}{
+            \DeclareFontFamily{U}{fsy}{}
+            \DeclareFontShape{U}{fsy}{m}{n}{<->s*[.9]psyr}{}
+            \DeclareSymbolFont{mm@grup}{U}{fsy}{m}{n}
+            \DeclareMathSymbol{\pi}{\mathord}{mm@grup}{`p}
+          }{}}}
+          
+          \else\ifmm@mathdesign
+          \ifdefstring{\mm@mathdesign@option}{Utopia}{
+            \DeclareSymbolFont{mm@grup}{OML}{mdput}{m}{n}
+          }{
+          \ifdefstring{\mm@mathdesign@option}{Garamond}{
+            \DeclareSymbolFont{mm@grup}{OML}{mdugm}{m}{n}
+          }{
+          \ifdefstring{\mm@mathdesign@option}{Charter}{
+            \DeclareSymbolFont{mm@grup}{OML}{mdbch}{m}{n}
+          }{}}}
+
+          \else\ifmm@fourier
+            \DeclareFontEncoding{FML}{}{}
+            \DeclareSymbolFont{mm@grup}{FML}{futm}{m}{it}
+          
+          \else\ifmm@kpfonts
+          \ifdefstring{\mm@kp@option}{normal}{
+            \DeclareSymbolFont{mm@grup}{U}{jkpmia}{m}{it}
+          }{
+          \ifdefstring{\mm@kp@option}{light}{
+            \DeclareSymbolFont{mm@grup}{U}{jkplmia}{m}{it}          
+          }}
+                         
+          \else\ifmm@pxfonts
+            \DeclareSymbolFont{mm@grup}{U}{pxmia}{m}{it}
+          
+          \else\ifmm@txfonts
+            \DeclareSymbolFont{mm@grup}{U}{txmia}{m}{it}
+          \fi\fi\fi\fi\fi
+          
+            \DeclareMathSymbol{\pi}{\mathord}{mm@grup}{"19}
+          \fi\fi
+          
+          \let\savedpi\pi
+        }{\renewcommand{\pi}{\csname #1\endcsname}\let\savedpi\pi}
+      }}
     }
-} 
+}
 
-\newcommand{\pinormal}{\@ifundefined{itpi}{}{\let\pi\itpi}}
+\newcommand{\pinormal}{%
+  \@ifundefined{itpi}{
+    \PackageWarning{mismath}{Command \string\itpi\space undefined,
+    \MessageBreak
+    use \string\pinumber\space in the preamble first}
+  }{
+    \ifmm@unicodemath
+      \@ifundefined{savedpi}{
+        \PackageError{mismath}{Before using \string \pinormal,
+        \MessageBreak
+        you must call \string\pinumber\space in the preamble}{}}
+    \fi
+    \let\pi\itpi
+  }
+}
 
 %    \end{macrocode}
 %
@@ -1702,7 +1895,7 @@
 % \bibitem{SPAL} \emph{The \textsf{spalign} package}, Joseph Rabinoff, CTAN, 2016/10/05.
 % \bibitem{NMATX} \emph{The package \textsf{nicematrix}}, François Pantigny, CTAN,
 % v6.14 2023/02/18.
-% \bibitem{FR} \emph{L'extension \textsf{frenchmath}}, Antoine Missier, CTAN, v2.8 2024/01/22.
+% \bibitem{FR} \emph{L'extension \textsf{frenchmath}}, Antoine Missier, CTAN, v2.10 2024/02/25.
 % \bibitem{BRACKET} \emph{Intelligent brackets -- The \textsf{ibrackets} package},
 % Antoine Missier, CTAN, v1.2, 2023/07/26.
 % \bibitem{LSHORT} \emph{The Not So Short Introduction to \LaTeXe}, 
diff --git a/Master/texmf-dist/source/latex/mismath/mismath.ins b/Master/texmf-dist/source/latex/mismath/mismath.ins
index 5a39f8da297..b57ee6b828b 100644
--- a/Master/texmf-dist/source/latex/mismath/mismath.ins
+++ b/Master/texmf-dist/source/latex/mismath/mismath.ins
@@ -46,7 +46,7 @@ and version 1.3 or later is part of all distributions of LaTeX version
 \Msg{*     mismath.sty                                           *}
 \Msg{*                                                           *}
 \Msg{* To produce the documentation run the file mismath.dtx     *}
-\Msg{* through LaTeX.                                            *}
+\Msg{* through XeLaTeX or LuaLaTeX.                                            *}
 \Msg{*                                                           *}
 \Msg{* Happy TeXing!                                             *}
 \Msg{*                                                           *}
diff --git a/Master/texmf-dist/tex/latex/mismath/mismath.sty b/Master/texmf-dist/tex/latex/mismath/mismath.sty
index 7def34be729..2aded5feecc 100644
--- a/Master/texmf-dist/tex/latex/mismath/mismath.sty
+++ b/Master/texmf-dist/tex/latex/mismath/mismath.sty
@@ -22,7 +22,7 @@
 %% 
 \NeedsTeXFormat{LaTeX2e}[2005/12/01]
 \ProvidesPackage{mismath}
-    [2024/02/20 v2.10 .dtx Miscellaneous mathematical macros]
+    [2024/02/26 v2.11 .dtx Miscellaneous mathematical macros]
 \newif\ifmm@ibrackets % initialized to false
 \newif\ifmm@decimalcomma
 \DeclareOption{ibrackets}{\mm@ibracketstrue}
@@ -33,10 +33,10 @@
 \@ifpackageloaded{mathtools}{}{\RequirePackage{mathtools}}
 \@ifpackageloaded{esvect}{}{\RequirePackage[b]{esvect}}
 \RequirePackage{ifthen}
-\RequirePackage{xparse} % provides \NewDocumentCommand
 \RequirePackage{xspace}
 \RequirePackage{iftex}
 \RequirePackage{etoolbox} % provides \AtEndPreamble
+\RequirePackage{xkeyval}
 
 \newif\ifmm@unicodemath
 \newif\ifmm@multicol
@@ -190,47 +190,131 @@
 \newcommand{\PEupright}{
     \PackageWarning{mismath}{Old command \string\PEupright\space
         is used. \MessageBreak
-        It can be replaced by \string\MathUp{P}\space
-        and \string\MathUp{E}}
+        It can be replaced by \string\MathProba{PE}}
     \MathUp{P}\MathUp{E}
 }
 
-\newcommand*\pinumber[1][]{
-    \ifmm@unicodemath
-        \PackageError{mismath}{Command \string\pinumber\space
-            is incompatible with unicode-math. \MessageBreak
-            Use \string\uppi\space to get the upright pi}{}
-    \fi
-    \@ifundefined{itpi}{\let\itpi\pi}{}
-    \ifthenelse{\equal{#1}{}}{
+\newif\ifmm@lgr
+\define@cmdkey{pinumber}[mm@]{lgrmath}[lmr]{\mm@lgrtrue}
+\newif\ifmm@upgreek
+\define@choicekey{pinumber}{upgreek}[\mm@upgreek@option]%
+  {Euler,Symbol,Symbolsmallscale}[Symbol]{\mm@upgreektrue}
+\newif\ifmm@mathdesign
+\define@choicekey{pinumber}{mathdesign}[\mm@mathdesign@option]%
+  {Utopia,Garamond,Charter}[Charter]{\mm@mathdesigntrue}
+\define@boolkey{pinumber}[mm@]{fourier}[true]{}
+\newif\ifmm@kpfonts
+\define@choicekey{pinumber}{kpfonts}[\mm@kp@option]%
+  {normal,light}[normal]{\mm@kpfontstrue}
+\define@boolkey{pinumber}[mm@]{pxfonts}[true]{}
+\define@boolkey{pinumber}[mm@]{txfonts}[true]{}
+
+\newcommand*\pinumber[1][]{%
+    \ifthenelse{\equal{#1}{}}{% no argument given
       \ifx\@onlypreamble\@notprerr % not in preamble
         \@ifundefined{savedpi}{
             \PackageWarning{mismath}{%
-                \string\pinumber\space without argument\MessageBreak
-                must be used in the preamble first\MessageBreak
-                to load LGR fontenc for upright pi}
+                \string\pinumber\space
+                must be used in the preamble first}
         }{\let\pi\savedpi}
       \else % in the preamble
-        \RequirePackage[LGR,T1]{fontenc}
-        \DeclareSymbolFont{UpGr}{LGR}{lmr}{m}{n}
-        \let\pi\relax
-        \DeclareMathSymbol{\pi}\mathalpha{UpGr}{"70}
-        \let\savedpi\pi
+        \AtBeginDocument{\let\itpi\pi}% must be here with unicode-math
+        \AtEndPreamble{\AtBeginDocument{
+          %\let\itpi\pi
+          \let\pi\relax
+          \DeclareFontEncoding{LGR}{}{}
+          \DeclareSymbolFont{mm@grup}{LGR}{lmr}{m}{n}
+          \DeclareMathSymbol{\pi}\mathalpha{mm@grup}{"70}
+          \let\savedpi\pi
+        }}
       \fi
-    }{
-      \@ifundefined{#1}{
-          \PackageWarning{mismath}{%
-              #1 must be a valid command name\MessageBreak
-              for pinumber, but command \bslash #1
-              is undefined.\MessageBreak
-              Perhaps a missing package}
-      }{\renewcommand{\pi}{%
-          \csname #1\endcsname}
-      }
+    }{% command name or keyval options, necessarily in the preamble
+      \AtBeginDocument{\let\itpi\pi}% must be here with unicode-math
+      \AtEndPreamble{\AtBeginDocument{
+        \@ifundefined{#1}{%
+          \setkeys{pinumber}{#1}
+          \let\pi\relax
+          \ifmm@lgr
+            \DeclareFontEncoding{LGR}{}{}
+            \DeclareSymbolFont{mm@grup}{LGR}{\mm@lgrmath}{m}{n}
+            % may work with bold (b) instead of m
+            \DeclareMathSymbol{\pi}{\mathalpha}{mm@grup}{112}
+
+          \else\ifmm@upgreek
+          \ifdefstring{\mm@upgreek@option}{Euler}{
+            \DeclareFontFamily{U}{eur}{\skewchar\font'177}
+            \DeclareFontShape{U}{eur}{m}{n}{%
+              <-6> eurm5 <6-8> eurm7 <8-> eurm10}{}
+            \DeclareFontShape{U}{eur}{b}{n}{%
+              <-6> eurb5 <6-8> eurb7 <8-> eurb10}{}
+            \DeclareSymbolFont{mm@grup}{U}{eur}{m}{n}
+            \DeclareMathSymbol{\pi}{\mathord}{mm@grup}{"19} % 25
+          }{
+          \ifdefstring{\mm@upgreek@option}{Symbol}{
+            \DeclareSymbolFont{mm@grup}{U}{psy}{m}{n}
+            \DeclareMathSymbol{\pi}{\mathord}{mm@grup}{`p}
+          }{
+          \ifdefstring{\mm@upgreek@option}{Symbolsmallscale}{
+            \DeclareFontFamily{U}{fsy}{}
+            \DeclareFontShape{U}{fsy}{m}{n}{<->s*[.9]psyr}{}
+            \DeclareSymbolFont{mm@grup}{U}{fsy}{m}{n}
+            \DeclareMathSymbol{\pi}{\mathord}{mm@grup}{`p}
+          }{}}}
+
+          \else\ifmm@mathdesign
+          \ifdefstring{\mm@mathdesign@option}{Utopia}{
+            \DeclareSymbolFont{mm@grup}{OML}{mdput}{m}{n}
+          }{
+          \ifdefstring{\mm@mathdesign@option}{Garamond}{
+            \DeclareSymbolFont{mm@grup}{OML}{mdugm}{m}{n}
+          }{
+          \ifdefstring{\mm@mathdesign@option}{Charter}{
+            \DeclareSymbolFont{mm@grup}{OML}{mdbch}{m}{n}
+          }{}}}
+
+          \else\ifmm@fourier
+            \DeclareFontEncoding{FML}{}{}
+            \DeclareSymbolFont{mm@grup}{FML}{futm}{m}{it}
+
+          \else\ifmm@kpfonts
+          \ifdefstring{\mm@kp@option}{normal}{
+            \DeclareSymbolFont{mm@grup}{U}{jkpmia}{m}{it}
+          }{
+          \ifdefstring{\mm@kp@option}{light}{
+            \DeclareSymbolFont{mm@grup}{U}{jkplmia}{m}{it}
+          }}
+
+          \else\ifmm@pxfonts
+            \DeclareSymbolFont{mm@grup}{U}{pxmia}{m}{it}
+
+          \else\ifmm@txfonts
+            \DeclareSymbolFont{mm@grup}{U}{txmia}{m}{it}
+          \fi\fi\fi\fi\fi
+
+            \DeclareMathSymbol{\pi}{\mathord}{mm@grup}{"19}
+          \fi\fi
+
+          \let\savedpi\pi
+        }{\renewcommand{\pi}{\csname #1\endcsname}\let\savedpi\pi}
+      }}
     }
 }
 
-\newcommand{\pinormal}{\@ifundefined{itpi}{}{\let\pi\itpi}}
+\newcommand{\pinormal}{%
+  \@ifundefined{itpi}{
+    \PackageWarning{mismath}{Command \string\itpi\space undefined,
+    \MessageBreak
+    use \string\pinumber\space in the preamble first}
+  }{
+    \ifmm@unicodemath
+      \@ifundefined{savedpi}{
+        \PackageError{mismath}{Before using \string \pinormal,
+        \MessageBreak
+        you must call \string\pinumber\space in the preamble}{}}
+    \fi
+    \let\pi\itpi
+  }
+}
 
 \newboolean{arrowvect}
 \setboolean{arrowvect}{true}