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diff --git a/fonts/old-arrows/doc/old-arrows.tex b/fonts/old-arrows/doc/old-arrows.tex new file mode 100644 index 0000000000..206dec4e5b --- /dev/null +++ b/fonts/old-arrows/doc/old-arrows.tex @@ -0,0 +1,529 @@ +%% start of file `old-arrows.tex'. +%% Copyright 2015-2017 Riccardo Dossena (riccardo.dossena@gmail.com). +% +% This work may be distributed and/or modified under the +% conditions of the LaTeX Project Public License version 1.3c, +% available at http://www.latex-project.org/lppl/. +%% +\documentclass[11pt]{ltxdoc} + +\usepackage[english]{babel} +\usepackage[T1]{fontenc} +\usepackage{amsmath,amssymb,amsthm} +\usepackage[shortlabels]{enumitem} +\usepackage{stmaryrd} +\usepackage{mathtools} +\usepackage[new]{old-arrows} +\usepackage[hmargin=3.3cm,vmargin=2.5cm,footskip=30pt]{geometry} +\usepackage[colorlinks=true]{hyperref} +\usepackage[all]{hypcap} % needed to help hyperlinks direct correctly; +\usepackage[chicago]{ellipsis} + +\def\fileversion{2.0} +\def\filedate{January 5, 2017} + +%Logo per MiKTeX e TeXLive +\newcommand{\MiKTeX}{MiK\TeX} +\newcommand{\TeXLive}{\mbox{\TeX\ Live}} +% +% +% Symbol Entry for Math Symbol Tables +% +\newcommand{\X}[1]{$#1$&\texttt{\string#1}\hspace*{1ex}} + +\newcommand{\W}[2]{$#1{#2}$& + \texttt{\string#1}\texttt{\string{\string#2\string}}\hspace*{1ex}} + +\theoremstyle{remark} +\newtheorem*{remark}{Remark} + +% Mathsymbol Table +\newsavebox{\symbbox} +\newenvironment{symbols}[1]% +{\par\vspace*{2ex} +\renewcommand{\arraystretch}{1.1} +\begin{lrbox}{\symbbox} +\hspace*{4ex}\begin{tabular}{@{}#1@{}}}% +{\end{tabular}\end{lrbox}\makebox[\textwidth]{\usebox{\symbbox}}\par\medskip} + +%Per l'esempio senza amsmath +\makeatletter +\def\overrightfreccia#1{\vbox{\m@th\ialign{##\crcr + \rightfrecciafill\crcr\noalign{\kern-\p@\nointerlineskip} + $\hfil\displaystyle{#1}\hfil$\crcr}}} +\def\overleftfreccia#1{\vbox{\m@th\ialign{##\crcr + \leftfrecciafill\crcr\noalign{\kern-\p@\nointerlineskip}% + $\hfil\displaystyle{#1}\hfil$\crcr}}} +\def\varoverrightfreccia#1{\vbox{\m@th\ialign{##\crcr + \varrightfrecciafill\crcr\noalign{\kern-\p@\nointerlineskip} + $\hfil\displaystyle{#1}\hfil$\crcr}}} +\def\varoverleftfreccia#1{\vbox{\m@th\ialign{##\crcr + \varleftfrecciafill\crcr\noalign{\kern-\p@\nointerlineskip}% + $\hfil\displaystyle{#1}\hfil$\crcr}}} +\def\rightfrecciafill{$\m@th\smash\meno\mkern-7mu% + \cleaders\hbox{$\mkern-2mu\smash\meno\mkern-2mu$}\hfill + \mkern-7mu\mathord\rightarrow$} +\def\leftfrecciafill{$\m@th\mathord\leftarrow\mkern-7mu% + \cleaders\hbox{$\mkern-2mu\smash\meno\mkern-2mu$}\hfill + \mkern-7mu\smash\meno$} +\def\varrightfrecciafill{$\m@th\smash-\mkern-7mu% + \cleaders\hbox{$\mkern-2mu\smash-\mkern-2mu$}\hfill + \mkern-7mu\mathord\varrightarrow$} +\def\varleftfrecciafill{$\m@th\mathord\varleftarrow\mkern-7mu% + \cleaders\hbox{$\mkern-2mu\smash-\mkern-2mu$}\hfill + \mkern-7mu\smash-$} +\makeatother + +\begin{document} + +\title{The \textsf{old-arrows} package} +\author{Riccardo Dossena\thanks{% +E-mail: \href{mailto:riccardo.dossena@gmail.com}{\tt riccardo.dossena@gmail.com}}} +\date{Version \fileversion, released on \filedate} + +\maketitle + +\begin{abstract} +This package provides Computer Modern old-style arrows ($\rightarrow$) with smaller arrowheads, associated +with ordinary \LaTeX\ commands. It can be used in a document that contains other \texttt{amssymb} arrow +characters, like $\twoheadrightarrow$, which also have small arrowheads. It is possible to use the usual +new-style Computer Modern arrows ($\varrightarrow$) together with the old-style ones. +\end{abstract} + +\tableofcontents + +%\pagebreak + +\section{Introduction} + +In 1992, Donald E. Knuth made some important corrections to Computer Modern fonts\footnote{See +\url{http://www-cs-faculty.stanford.edu/~uno/cm.html}}. As a consequence, the characters corresponding to +arrows have been modified. Just to make things clearer, +\[ +A \to B +\] +became +\[ +A \varto B +\] +that is, the character $\to$ was replaced by $\varto$, which has a larger arrowhead. The same happened to +other arrow characters. However, many arrow characters defined by \texttt{amssymb}, like $\nrightarrow$, +$\rightarrowtail$, $\twoheadrightarrow$ and others, maintained a small arrowhead and seem too different from +$\varto$. + +The \texttt{old-arrows} package with Old Arrows font family allows the user to use the old-style arrows +($\to$, $\gets$, \ldots) with the traditional commands (\verb|\rightarrow|, \verb|\leftarrow|,~\ldots). +Furthermore, the options \texttt{new} and \texttt{old} allow the user to obtain the new-style arrows +($\varto$, $\vargets$,~\ldots) together with the old-style ones by putting \verb|\var| before the +corresponding commands (\verb|\varrightarrow|, \verb|\varleftarrow|,~\ldots)\footnote{See sections +\ref{sec:new} and \ref{sec:old}.}. + +Old Arrows font family was derived from an old version of Blue Sky Computer Modern Math Symbols (1991--1992, +released by AMS) by deleting many characters with FontForge. + +\section{Licenses} + +The \LaTeX\ code in this package is licensed under the \LaTeX\ Project Public License, v1.3. + +The fonts in this package are licensed under the SIL Open Font License, v1.1. + +\section{Installation} + +The \texttt{old-arrows} package is included in the latest \MiKTeX\ and \TeXLive\ distributions. However, if +you want to install it manually, follow the instructions below. + +\subsection{Copying the files in the local \texttt{texmf} tree} + +The Old Arrows fonts files are: + +\begin{center} +\begin{tabular}{p{3cm}p{3cm}p{3cm}l} +\hline +\texttt{oasy5.afm} & \texttt{oasy5.pfm} & \texttt{oasy5.tfm} & \texttt{oasy5.pfb} \\ +\texttt{oasy6.afm} & \texttt{oasy6.pfm} & \texttt{oasy6.tfm} & \texttt{oasy6.pfb} \\ +\texttt{oasy7.afm} & \texttt{oasy7.pfm} & \texttt{oasy7.tfm} & \texttt{oasy7.pfb} \\ +\texttt{oasy8.afm} & \texttt{oasy8.pfm} & \texttt{oasy8.tfm} & \texttt{oasy8.pfb} \\ +\texttt{oasy9.afm} & \texttt{oasy9.pfm} & \texttt{oasy9.tfm} & \texttt{oasy9.pfb} \\ +\texttt{oasy10.afm} & \texttt{oasy10.pfm} & \texttt{oasy10.tfm} & \texttt{oasy10.pfb} \\ +\texttt{oabsy5.afm} & \texttt{oabsy5.pfm} & \texttt{oabsy5.tfm} & \texttt{oabsy5.pfb} \\ + & & \texttt{oabsy6.tfm} & \\ +\texttt{oabsy7.afm} & \texttt{oabsy7.pfm} & \texttt{oabsy7.tfm} & \texttt{oabsy7.pfb} \\ + & & \texttt{oabsy8.tfm} & \\ + & & \texttt{oabsy9.tfm} & \\ +\texttt{oabsy10.afm} & \texttt{oabsy10.pfm} & \texttt{oabsy10.tfm} & \texttt{oabsy10.pfb} \\ +\hline +\end{tabular} +\end{center} + +These files were derived from Computer Modern fonts \texttt{cmbsy5}, \texttt{cmbsy7}, \texttt{cmbsy10}, +\texttt{cmsy5}, \texttt{cmsy7}, \texttt{cmsy8}, \texttt{cmsy9} and \texttt{cmsy10}. + +Call \texttt{<localtexmf>} the path of your local \texttt{texmf} tree. For \TeXLive, the local tree is +usually placed in \texttt{/usr/local/texlive/texmf-local}; for \MiKTeX, it can be set up on any directory, by +the \textsf{Roots} tab of ``\MiKTeX\ Options''. + +\begin{enumerate} +\item Copy the \texttt{*.afm} and \texttt{*.tfm} font files into the corresponding \texttt{old-arrows} + directories (you have to create them, as shown below): +\begin{verbatim} + <localtexmf>/fonts/afm/old-arrows + <localtexmf>/fonts/tfm/old-arrows +\end{verbatim} + +\item Copy the \texttt{*.pfb} and \texttt{*.pfm} font files into the directory +\begin{verbatim} + <localtexmf>/fonts/type1/old-arrows +\end{verbatim} + +\item Copy the \texttt{oasy.enc} and \texttt{oasy.map} files, respectively, into the directories +\begin{verbatim} + <localtexmf>/fonts/enc/dvips/old-arrows + <localtexmf>/fonts/map/dvips/old-arrows +\end{verbatim} + +\item Copy the \texttt{old-arrows.sty} file into the directory +\begin{verbatim} + <localtexmf>/tex/latex/old-arrows +\end{verbatim} +\end{enumerate} + +\subsection{Updating the filename database}\label{agg-database-file} + +\begin{description}[font=\bfseries\sffamily, leftmargin=5em, style=sameline] +\item[\MiKTeX] On the \textsf{General} tab of ``MiKTeX Options (Admin)'' click the \textsf{Refresh~FNDB} + button. Alternatively, in a DOS command prompt window run +\begin{verbatim} + initexmf --update-fndb +\end{verbatim} + +\item[\TeXLive] Start the ``\TeXLive\ Manager''. From \textsf{Actions} menu, select \textsf{Update + filename + database}. Alternatively, run in a terminal command line +\begin{verbatim} + mktexlsr +\end{verbatim} +\end{description} + +\subsection{Updating the font map files} + +\begin{description}[font=\bfseries\sffamily, leftmargin=5em, style=sameline] +\item[\MiKTeX] To update the configuration file \texttt{updmap.cfg}, execute in a DOS command prompt +\begin{verbatim} + initexmf --edit-config-file updmap +\end{verbatim} +add to \texttt{updmap.cfg} (that will be opened) the following line +\begin{verbatim} + Map oasy.map +\end{verbatim} +save, close and execute (always in the DOS command prompt) +\begin{verbatim} + initexmf --mkmaps +\end{verbatim} + +\item[\TeXLive] Execute in a terminal command line +\begin{verbatim} + updmap-sys --enable Map=oasy.map +\end{verbatim} +\end{description} +Finally, it is better to make another update of the filename database (see~\ref{agg-database-file}). + +\section{Usage} + +\subsection{Basic usage} + +Simply type in the preamble of your \LaTeX\ document +\begin{verbatim} + \usepackage{old-arrows} +\end{verbatim} +and every arrow command will be associated to the ``old-style'', as indicated in +table~\ref{tab-frecce-vecchie}. + +\begin{table}[!htbp] +\begin{symbols}{*3{cl}} + \X{\leftarrow}or \verb|\gets|& \X{\longleftarrow} & \X{\uparrow} \\ + \X{\rightarrow}or \verb|\to|& \X{\longrightarrow} & \X{\downarrow} \\ + \X{\leftrightarrow} & \X{\longleftrightarrow}& \X{\updownarrow} \\ + \X{\mapsto} & \X{\longmapsto} & \X{\nearrow} \\ + \X{\hookleftarrow} & \X{\hookrightarrow} & \X{\searrow} \\ + \X{\leftharpoonup} & \X{\rightharpoonup} & \X{\swarrow} \\ + \X{\leftharpoondown} & \X{\rightharpoondown} & \X{\nwarrow} \\ +\end{symbols} +\caption{Old-style arrows provided by \texttt{old-arrows}.}\label{tab-frecce-vecchie} +\end{table} + +The commands \verb|\rightarrowfill| and \verb|\leftarrowfill| allow to fill empty spaces with extensible +arrows. For example, the first command written at the end of this paragraph gives the following result: +\rightarrowfill + +\subsection{Usage together with other packages} + +\subsubsection{\texttt{amsmath}} + +The \texttt{old-arrows} package does not require \texttt{amsmath}. However, if you want to use the +\texttt{amsmath} package, you must load it \emph{before} \texttt{old-arrows}: +\begin{verbatim} + \usepackage{amsmath} + \usepackage{old-arrows} +\end{verbatim} + +The \texttt{amsmath} package provides over, under (table~\ref{tab-frecce-vecchie-amsmath}), extensible +(table~\ref{tab-frecce-vecchie-ext}) arrows and operator names (table~\ref{tab-operatori-vecchi}). Note that +\texttt{amsmath} adds more space between the arrow above and the characters below, with a better +typographical result. The commands \verb|\overrightarrow{AB}| and \verb|\overleftarrow{AB}|, without +\texttt{amsmath}, produce respectively +\[ +\overrightfreccia{AB} \,\text{ rather than }\, \overrightarrow{AB} \qquad \text{and} \qquad +\overleftfreccia{AB} +\,\text{ rather than }\, \overleftarrow{AB}. +\] + +The \texttt{amsmath} package also provides the command \verb|\boldsymbol| for obtaining bold mathematical +symbols, which can be used together with \texttt{old-arrows}. For example, the commands +\begin{center} + \verb|$\boldsymbol{A \to B}$| \quad and \quad \verb|$\boldsymbol{\overrightarrow{AB}}$| +\end{center} +produce $\boldsymbol{A \to B}$ and $\boldsymbol{\overrightarrow{AB}}$, respectively. + +\begin{table}[!htbp] +\begin{symbols}{*3{cl}} + \W{\overleftarrow}{AB} & \W{\underleftarrow}{AB} \\ + \W{\overrightarrow}{AB} & \W{\underrightarrow}{AB} \\ + \W{\overleftrightarrow}{AB} & \W{\underleftrightarrow}{AB} \\ +\end{symbols} +\caption{Old-style over and under arrows provided by \texttt{amsmath}.}\label{tab-frecce-vecchie-amsmath} +\end{table} +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \W{\xleftarrow}{ABCDEF} & \W{\xrightarrow}{ABCDEF} \\ +\end{symbols} +\caption{Old-style extensible arrows provided by \texttt{amsmath}.}\label{tab-frecce-vecchie-ext} +\end{table} +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \X{\varinjlim} & \X{\varprojlim} \\ +\end{symbols} +\caption{Old-style operator names provided by \texttt{amsmath}.}\label{tab-operatori-vecchi} +\end{table} + +\subsubsection{\texttt{lmodern}} + +The \texttt{old-arrows} package is fully compatible with the Latin Modern fonts, provided that you load the +\texttt{lmodern} package \emph{before} \texttt{old-arrows}. +\begin{verbatim} + \usepackage{lmodern} + \usepackage{old-arrows} +\end{verbatim} + +\subsubsection{\texttt{stmaryrd}} + +The \texttt{old-arrows} package is also fully compatible with the St Mary's Road symbol font, always provided +that you load the \texttt{stmaryrd} package \emph{before} \texttt{old-arrows}. +\begin{verbatim} + \usepackage{stmaryrd} + \usepackage{old-arrows} +\end{verbatim} + +The \texttt{stmaryrd} package provides several arrow characters with small arrowheads, like +\verb|\shortrightarrow| ($\shortrightarrow$) and \verb|\nnearrow| ($\nnearrow$). However, without +\texttt{old-arrows}, the commands \verb|\mapsfrom| and \verb|\longmapsfrom| produce the new-style arrows +$\varmapsfrom$ and $\varlongmapsfrom$. Instead, the \texttt{old-arrows} package allows you to obtain the +old-style version of these arrows, as shown in table~\ref{tab-frecce-vecchie-smr}. + +\begin{table}[!htbp] + \begin{symbols}{*2{cl}} + \X{\mapsfrom} & \X{\longmapsfrom} \\ +\end{symbols} +\caption{Old-style arrows provided by \texttt{stmaryrd}.}\label{tab-frecce-vecchie-smr} +\end{table} + +%\pagebreak + +\subsubsection{\texttt{mathtools}} + + +The \texttt{old-arrows} package can be used together with the \texttt{mathtools} package, always on condition +that you load it \emph{before} \texttt{old-arrows}. +\begin{verbatim} + \usepackage{mathtools} + \usepackage{old-arrows} +\end{verbatim} + +The \texttt{mathtools} package makes additional extensible arrows available +(table~\ref{tab-frecce-vecchie-mt}). + +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \W{\xleftrightarrow}{ABCDEF} & \W{\xmapsto}{ABCDEF} \\ + \W{\xhookleftarrow}{ABCDEF} & \W{\xhookrightarrow}{ABCDEF} \\ +\end{symbols} +\caption{Old-style extensible arrows provided by \texttt{mathtools}.}\label{tab-frecce-vecchie-mt} +\end{table} + +Every extensible arrow can take an optional argument that produces a subscript. For example, the commands +\begin{center} + \verb|\xrightarrow[G]{ABCDEF}| \quad and \quad \verb|\xmapsto[G]{ABCDEF}| +\end{center} +produce +\begin{center} +$\xrightarrow[G]{ABCDEF}$ \quad and \quad $\xmapsto[G]{ABCDEF}$ +\end{center} + +%\pagebreak + +\begin{remark} +It is very important that you load \texttt{old-arrows} \emph{after} \texttt{amsmath}, \texttt{stmaryrd}, +\texttt{lmodern} and \texttt{mathtools}, because many commands of these packages must be redefined by +\texttt{old-arrows}. Otherwise, \texttt{old-arrows} won't work properly. +\begin{verbatim} + \usepackage{lmodern} + \usepackage{amsmath} + \usepackage{stmaryrd} + \usepackage{mathtools} + \usepackage{old-arrows} +\end{verbatim} +\end{remark} + + +\subsection{The option \textsf{new}}\label{sec:new} + +Loading \texttt{old-arrows} with the option \texttt{new} +\begin{verbatim} + \usepackage[new]{old-arrows} +\end{verbatim} +allows you to use the new-style and the old-style arrows simultaneously. In order to obtain new-style arrows, +just put \verb|\var| before every ordinary command, as shown in tables~\ref{tab-frecce-nuove}, +\ref{tab-frecce-nuove-amsmath}, \ref{tab-frecce-nuove-ext}, \ref{tab-operatori-nuovi}, +\ref{tab-frecce-nuove-smr} and \ref{tab-frecce-nuove-mt}. + +\begin{table}[!htbp] +\begin{symbols}{*3{cl}} + \X{\varleftarrow}or \verb|\vargets|& \X{\varlongleftarrow} & \X{\varuparrow} \\ + \X{\varrightarrow}or \verb|\varto|& \X{\varlongrightarrow} & \X{\vardownarrow} \\ + \X{\varleftrightarrow} & \X{\varlongleftrightarrow}& \X{\varupdownarrow} \\ + \X{\varmapsto} & \X{\varlongmapsto} & \X{\varnearrow} \\ + \X{\varhookleftarrow} & \X{\varhookrightarrow} & \X{\varsearrow} \\ + \X{\leftharpoonup} & \X{\rightharpoonup} & \X{\varswarrow} \\ + \X{\leftharpoondown} & \X{\rightharpoondown} & \X{\varnwarrow} \\ +\end{symbols} +\caption{New-style arrows provided by option \texttt{new}.}\label{tab-frecce-nuove} +\end{table} +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \W{\varoverleftarrow}{AB} & \W{\varunderleftarrow}{AB} \\ + \W{\varoverrightarrow}{AB} & \W{\varunderrightarrow}{AB} \\ + \W{\varoverleftrightarrow}{AB} & \W{\varunderleftrightarrow}{AB} \\ +\end{symbols} +\caption{New-style over and under arrows provided by \texttt{amsmath} and the option \texttt{new} of +\texttt{old-arrows}.} +\label{tab-frecce-nuove-amsmath} +\end{table} +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \W{\varxleftarrow}{ABCDEF} & \W{\varxrightarrow}{ABCDEF} \\ +\end{symbols} +\caption{New-style extensible arrows provided by \texttt{amsmath} and the option \texttt{new} of +\texttt{old-arrows}.} +\label{tab-frecce-nuove-ext} +\end{table} +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \X{\varvarinjlim} & \X{\varvarprojlim} \\ +\end{symbols} +\caption{New-style operator names provided by \texttt{amsmath} and the option \texttt{new} of +\texttt{old-arrows}.}\label{tab-operatori-nuovi} +\end{table} +\begin{table}[!htbp] + \begin{symbols}{*2{cl}} + \X{\varmapsfrom} & \X{\varlongmapsfrom} \\ +\end{symbols} +\caption{New-style arrows provided by \texttt{stmaryrd} and the option \texttt{new} of +\texttt{old-arrows}.}\label{tab-frecce-nuove-smr} +\end{table} +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \W{\varxleftrightarrow}{ABCDEF} & \W{\varxmapsto}{ABCDEF} \\ + \W{\varxhookleftarrow}{ABCDEF} & \W{\varxhookrightarrow}{ABCDEF} \\ +\end{symbols} +\caption{New-style extensible arrows provided by \texttt{mathtools} and the option \texttt{new} of +\texttt{old-arrows}.}\label{tab-frecce-nuove-mt} +\end{table} +\pagebreak + +Note that the commands +\begin{center} +\verb|\leftharpoonup|, \verb|\rightharpoonup|, \verb|\leftharpoondown|, \verb|\rightharpoondown| +\end{center} +have not been redefined by \texttt{old-arrows}, because the corresponding characters +$\leftharpoonup,\rightharpoonup,\leftharpoondown,\rightharpoondown$ have not been modified by the +introduction of the new-style arrows. + +The commands \verb|\varrightarrowfill| and \verb|\varleftarrowfill| allow to fill empty spaces with +extensible arrows. For example, the first command written at the end of this paragraph gives the following +result: \varrightarrowfill + +If you want to use the option \texttt{new} and the option \texttt{only} provided by the \texttt{stmaryrd} +package, you must write the command you wish to define in both ordinary and \verb|\var| versions in the +option list. For example: +\begin{verbatim} + \usepackage[only,mapsfrom,varmapsfrom]{stmaryrd} + \usepackage[new]{old-arrows} +\end{verbatim} +says that only the symbols $\mapsfrom$ and $\varmapsfrom$ will be defined by \texttt{stmaryrd}. + +Furthermore, with the option \texttt{new} it is also possibile to use the command \verb|\boldsymbol| provided +by \texttt{amsmath}. The following commands +\begin{center} + \verb|$\boldsymbol{A \varto B}$| \quad and \quad \verb|$\boldsymbol{\varoverrightarrow{AB}}$| +\end{center} +produce $\boldsymbol{A \varto B}$ and $\boldsymbol{\varoverrightarrow{AB}}$ respectively. + +\subsection{The option \textsf{old}}\label{sec:old} + +If you want to use the old-style arrows only in a few cases, and maintain the new-style by default, then it +is available the option \texttt{old} +\begin{verbatim} + \usepackage[old]{old-arrows} +\end{verbatim} +that associates all of the commands with prefix \verb|\var| to the old-style rather than the new one, which +remains associated to the ordinary commands. For example, with the option \texttt{old} the commands +\begin{center} + \verb|$A \varleftarrow B$| \quad and \quad \verb|$A \varto B$| +\end{center} +produce $A \leftarrow B$ and $A \to B$ respectively, while +\begin{center} + \verb|$A \leftarrow B$| \quad and \quad \verb|$A \to B$| +\end{center} +produce $A \varleftarrow B$ and $A \varto B$, respectively. + +It is not possible to load the options \texttt{new} and \texttt{old} simultaneously (if so, you will get an +error message). + +\subsection{Additional arrow commands provided by \texttt{old-arrows}} + +The \texttt{old-arrows} package provides additional arrow commands that are listed in +table~\ref{tab-comandi-nuovi}. +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \X{\longhookrightarrow} & \X{\longhookleftarrow} \\ + \X{\varlonghookrightarrow}$^a$ & \X{\varlonghookleftarrow}$^a$ \\ + \X{\longleftharpoonup} & \X{\longleftharpoondown} \\ + \X{\longrightharpoonup} & \X{\longrightharpoondown} \\ +\end{symbols} +\centerline{\footnotesize $^a$Available with the option \texttt{new}.} +\caption{Arrow commands provided by \texttt{old-arrows}.}\label{tab-comandi-nuovi} +\end{table} + +Finally, there are extensible ``mapsfrom'' arrows (table~\ref{tab-frecce-mt-smr}) that are available only if +both \texttt{mathtools} and \texttt{stmaryrd} are loaded together with \texttt{old-arrows} (as they depend on +commands defined by these two packages). +\begin{table}[!htbp] +\begin{symbols}{*2{cl}} + \W{\xmapsfrom}{ABCDEF} & \W{\varxmapsfrom}{ABCDEF}$^a$ \\ +\end{symbols} +\centerline{\footnotesize $^a$Available with the option \texttt{new}.} +\caption{Extensible arrows provided by \texttt{old-arrows} together with \texttt{mathtools} and +\texttt{stmaryrd}.} +\label{tab-frecce-mt-smr} +\end{table} + +\end{document} |