diff --git a/doc/math/mathalias/.latexmkrc b/doc/math/mathalias/.latexmkrc
new file mode 100644
index 0000000..4c81cd6
--- /dev/null
+++ b/doc/math/mathalias/.latexmkrc
@@ -0,0 +1,4 @@
+$makeindex = "makeindex -s gind.ist %O -o %D %S";
+$clean_ext .= ' glo';
+$clean_ext .= ' hd';
+$clean_ext .= ' ins';
diff --git a/doc/math/mathalias/Makefile b/doc/math/mathalias/Makefile
new file mode 100644
index 0000000..e174370
--- /dev/null
+++ b/doc/math/mathalias/Makefile
@@ -0,0 +1,8 @@
+doc:
+	latexmk
+
+full:
+	latexmk -gg
+
+clean:
+	latexmk -C
diff --git a/doc/math/mathalias/mathalias.tex b/doc/math/mathalias/mathalias.tex
new file mode 100644
index 0000000..3c5ab1c
--- /dev/null
+++ b/doc/math/mathalias/mathalias.tex
@@ -0,0 +1,102 @@
+\documentclass[full]{l3doc}
+
+\title{The \pkg{mkessler-mathalias} package}
+\author{Maximilian Keßler}
+
+\usepackage{mkessler-mathalias}
+
+\begin{document}
+
+\maketitle
+
+\begin{abstract}
+  Lazy people prefer to write stuff like \cs{Z}, \cs{Q} to get the integers
+  $\mathbb{Z}$ and rationals $\mathbb{Q}$.
+  They also often use shortcuts like \cs{bA} for \cs{mathbb}\{A\} to get  $\mathbb{A}$.
+
+  While the author does not encourage such usage,
+  this package provide a general syntax to generate such aliases.
+\end{abstract}
+
+\begin{documentation}
+
+\section{(Don't) be lazy}
+
+You actually should \emph{not} use this package.
+This is poor \LaTeX style.
+In case you don't care, or you must, because your co-workers do so,
+this package is for you.
+
+The author personally uses
+\href{https://www.vim.org/}{Vim}
+and the
+\href{https://github.com/sirver/UltiSnips}{UltiSnips}
+plugin to facilitate \LaTeX writing whilst producing a clean document
+without those poor shortcut styles.
+So in fact, \emph{be} lazy, but do it the proper way.
+
+If you are, however, lazy, then put
+
+\begin{verbatim}
+  \usepackage[extended]{mkessler-mathalias}
+\end{verbatim}
+in your preamble.
+
+\section{Aliases}
+
+\begin{function}{\MakeAliasesForWith}
+  \begin{syntax}
+    \cs{MakeAliasesForwith}\marg{macro}\marg{shortcut}\marg{token list}
+  \end{syntax}
+
+  For each \meta{token} in the \meta{token list},
+  this declares
+  \enquote{\cs{shortcut\meta{token}}}
+  as an abbreviation for
+  \enquote{\meta{macro}\marg{token}}.
+
+  \begin{texnote}
+    In \LaTeX3 syntax, this function would have signature \texttt{Nnn},
+    so give the \meta{macro} as a single token directly.
+  \end{texnote}
+
+  \begin{texnote}
+    Technically, the \meta{token list} can contain any tokens that
+    are fully expandable and thus accepted by \cs{csname} \ldots \cs{endcsname}.
+    However, as you want \emph{shortcuts}, you would typically invoke this
+    with tokens of category code 12.
+  \end{texnote}
+\end{function}
+
+As an example,
+\begin{verbatim}
+  \MakeAliasesForWith\mathcal{c}{ABC}
+\end{verbatim}
+would define the three macros \cs{cA}, \cs{cB} and \cs{cC} to expand to
+\cs{mathcal}\{A\},
+\cs{mathcal}\{B\}
+and
+\cs{mathcal}\{c\},
+respectively.
+
+\section{Options for default aliases}
+  
+There are two options:
+
+\begin{description}
+  \item[basic]
+    This declares \cs{C}, \cs{F}, \cs{K}, \cs{N}, \cs{Q}, \cs{R} and \cs{Z}
+    to expand to the \cs{mathbb} variants of these letters.
+  \item[extended]
+    Implies option \textbf{basic}.
+    Also defines shortcuts for \cs{mathbb}, \cs{mathfrak} and \cs{mathcal}
+    for each capital arabic letter with the prefixes \enquote{b},
+    \enquote{f} and \enquote{c}, respectively.
+\end{description}
+
+
+\end{documentation}
+
+\PrintIndex
+  
+\end{document}