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%&lt;*package&gt;
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{hsrstud}[2021/08/04 v0.2 HSR-Stud Macros]
%&lt;/package&gt;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Documentation 
%&lt;*doc&gt;
\documentclass[a4paper]{ltxdoc}

\usepackage{hypdoc}

%% https://tex.stackexchange.com/questions/95882/avoid-multicol-error-error-saving-partial-page
%% \setlength\IndexMin{100pt}

\usepackage[left=4cm, right=4cm, top=3cm, bottom=3cm]{geometry}

\usepackage{\jobname}

\usepackage{fancyvrb}
\usepackage{enumitem}
\usepackage{framed}
\usepackage{booktabs}
\usepackage{tikz}
\usepackage{xargs}
\usepackage{bookmark}

\usepackage[
    type={CC},
    modifier={by-sa},
    version={4.0},
]{doclicense}

\CodelineIndex
\EnableCrossrefs
\RecordChanges

\makeatletter
\newlength\excodewidth
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    \leftbar\VerbatimEnvironment%
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    \begin{VerbatimOut}{\jobname.vrb}%
}{%
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}


\makeatother

\begin{document}
\GetFileInfo{\jobname.sty}
\title{^^A
  \texttt{\textcolor{hsr-blue}{hsr}stud} --- HSR-Stud Style and Macros\thanks{^^A
    This file describes version \fileversion, last revised \filedate.^^A
  }^^A
}
\author{Naoki Pross \texttt{&lt;naoki.pross@ost.ch&gt;}}
\date{Released \filedate}
\maketitle
\tableofcontents

\changes{v0.2}{2021/08/05}{Remove legacy code and update notation}
\changes{v0.1}{2020/02/16}{Initial draft}

\section{Purpose of this package}
This package is made for the HSR Studenten organization to provide an easy to 
use interface to give a more consistent look and feel for the works produced by 
its the members. A secondary objective of this package is to eliminate the
\emph{many} dispersed duplicate .tex files that fill the repositories of the 
HSR-Stud org.


\section{Package Options} \label{sec:options}
\begin{description}[align=right]
   \item[|dontrenew|] Do not renew existing \LaTeX{} commands and
       environments. This is useful when the package is loaded on a document
        that is already partially written.

   \item[|arrowvec|] Tells the package to use a vector notation with a small
       arrow over the variables, as it were handwritten.

   \item[|textvecdiff|] Disables the ``Nabla'' or ``Del'' notation for vector
       derivatives. Instead the symbols \(\vec{\nabla}, \vec{\nabla}\dotp,
        \vec{\nabla}\crossp, \nabla^2, \vec{\nabla}^2\) are be replaced with
        grad, div, curl and div grad.
\end{description}

\section{Summary notation}

\section{Default Theming}
\subsection{Links with \texttt{hyperref}}

\begin{example}
Colors from 
\cite{bib:hsrcolors} see \\
\url{https://intranet.hsr.ch}
\end{example}

\subsection{Source Code with \texttt{listings}}

\begin{hexample}
\begin{lstlisting}[language=C++]
int main(int argc, char *argv[], char *envp[]) {
   std::cout &lt;&lt; "hello world" &lt;&lt; std::endl;
}
\end{lstlisting}
\end{hexample}

\section{Mathematics}
\subsection{Vectors}

\begin{macro}{\vec}

Vectors notation. Aliases: \cs{v}, \cs{vc}. If the option \texttt{arrowvec}
described in \S \ref{sec:options} is enabled, the notation with a small
arrow over the varible will be used \(\hsrvecarrow{x}\), otherwise the
vector is bold \(\hsrvecbold{x}\). Takes one option \marg{letter}. \cs{v}
is renamed to \cs{vaccent} and \cs{vec} to \cs{oldvec}.

\begin{example}
\[ \vec{F} = m\vec{a} \]
\end{example}
\end{macro}

\begin{macro}{\uvec}
Unit vector notation. Alias \cs{uv}. Takes \marg{letter}. It is implemented
in terms of \cmd{\vec}, which means that the style is inherited.
\begin{example}
\[ \uvec{x} = \vec{x}/x \]
\end{example}
\end{macro}

\subsubsection{Products}
\begin{macro}{\dotp}
Dot product between vectors.
\begin{example}
\[ \vec{u}\dotp\vec{v} \]
\end{example}
\end{macro}

\begin{macro}{\crossp}
Cross product between vectors.
\begin{example}
\[ \vec{u}\crossp\vec{v} \]
\end{example}
\end{macro}


\subsection{Matrices}

\begin{macro}{\mx}
Matrix notation. Takes \marg{letter}.

\begin{example}
\[
    \mx{J} = \begin{pmatrix}
                0 &amp; 1 \\
                1 &amp; 0
              \end{pmatrix}
\]
\end{example}
\end{macro}

\subsection{Equalities}

\begin{macro}{\heq}
 L'H\^opital limit equality symbol.
\begin{hexample}
\[
    \lim_{x\to\infty} \frac{x}{x^2 - 1}
        \heq \lim_{x\to\infty} \frac{1}{2x}
        = 0
\]
\end{hexample}
\end{macro}

\subsection{Derivatives}
\subsubsection{Differentials}

\begin{macro}{\dd}
The differential element. It needs a \marg{var} and has the optional 
argument \oarg{order}.
\begin{example}
\[ \dd{x} \qquad \dd[4]{x} \]
\end{example}
\end{macro}

\begin{macro}{\di}
This is the same as \cs{dd} but with a small space in front, it is 
intended to be used in integrals for a nicer typesetting.
\begin{hexample}
\begin{align*}
    I &amp;= \int \vec{J}\dotp\dd{\vec{s}} \\
      &amp;= \iint \vec{J}\dotp\uvec{n}\di{x}\di{y}
\end{align*}
\end{hexample}
\end{macro}

\subsubsection{Scalar functions}

\begin{macro}{\deriv}
The derivative has arguments \marg{function}, \marg{var} and the optional 
argument \oarg{order}.
\begin{example}
\[
    \deriv{y}{x} \qquad
    \deriv[3]{y}{x}
\]
\end{example}
\end{macro}

%% TODO: add mixed partial derivatives (probably using xparse)
\begin{macro}{\pderiv}
The partial derivative has arguments \marg{function}, \marg{var} and the 
optional argument \oarg{order}.
\begin{example}
\[
    \pderiv{y}{x} \qquad
    \pderiv[3]{y}{x}
\]
\end{example}
\end{macro}

\subsubsection{Vector functions}

\begin{macro}{\grad}
The gradient vector operator.
\begin{example}
\[ \grad f \]
\end{example}
\end{macro}

\begin{macro}{\div}
The divergence operator, \cs{div} is renamed to \cs{divsymb}. If the option 
|donotrenew| is used \cs{divg} is also available.
\begin{example}
\[ \div \vec{f} \]
\end{example}
\end{macro}

\begin{macro}{\curl}
The curl operator.
\begin{example}
\[ \curl \vec{f} \]
\end{example}
\end{macro}

\begin{macro}{\laplacian}
The laplacian operator.
\begin{example}
\[
    \laplacian f
\]
\end{example}
\end{macro}

\begin{macro}{\vlaplacian}
The vector laplacian operator operator.
\begin{example}
\[
    \vlaplacian \vec{F}
\]
\end{example}
\end{macro}


\section{Colors}
\begin{center}
\begin{tikzpicture}
   \foreach \color/\y in {%
       hsr-blue/7,
       hsr-mauve/6,
       hsr-lakegreen/5,
       hsr-reed/4,
       hsr-petrol/3,
       hsr-basswood/2,
       hsr-lightgrey/1,
       hsr-black/0}{
       \foreach \x/\a in {0/,1/80,2/60,3/40,4/20}{
           \node[anchor=east] at (-.5,\y) {\texttt{\color}};
           \fill[color=\color\a] (\x,\y-.25) rectangle ++(1,.5);
           \node[anchor=west] at (\x,\y) {\texttt{\a}};
       }
   }
\end{tikzpicture}
\end{center}

\section{License}
\doclicenseThis

\begin{thebibliography}{3}
    \bibitem{bib:hsrcolors}
        HSR Intern: Corporate Design / Farben,
        \textit{Hochschule f\"ur Technik Rapperswil},
        \url{https://intranet.hsr.ch/Farben.7715.0.html}
\end{thebibliography}

\PrintChanges
\PrintIndex

\DocInput{\jobname.dtx}

\end{document}

%&lt;/doc&gt;
%\fi

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%    \appendix
%    \section{Implementation}
%    |hsrstud| package implementation with inline documentation

%\iffalse
%&lt;*package&gt;
%\fi

%    \subsection{Dependencies}
%    \begin{macrocode}
%% Dependencies ((
\RequirePackage{amsmath}
\RequirePackage{amssymb}
\RequirePackage{bm}

\RequirePackage{esint}
\PassOptionsToPackage{b}{esvect}
\RequirePackage{esvect}

\RequirePackage{xcolor}
\RequirePackage{hyperref}
\RequirePackage{listings}

\RequirePackage{iftex}
\RequirePackage{kvoptions}
%% ))
%    \end{macrocode}

%    \subsection{Package options}
%    \begin{macrocode}
\SetupKeyvalOptions{
    family=hsr,
    prefix=hsr@
}

%% Do not renew LaTeX Macros
\DeclareBoolOption[false]{dontrenew}

%% Vector style
\DeclareBoolOption[false]{arrowvec}
\DeclareComplementaryOption{boldvec}{arrowvec}

%% Vector derivative style
\DeclareBoolOption[false]{textvecdiff}
\DeclareComplementaryOption{delvecdiff}{textvecdiff}


%% Process options
\ProcessLocalKeyvalOptions*
%    \end{macrocode}


%    \subsection{Summary notation}
%    \begin{macrocode}
%% TODO: change letters in german
\newcommand{\bookref}[1]{\texttt{\textcolor{hsr-mauve}{P.#1}}}
\newcommand{\notesref}[1]{\texttt{\textcolor{hsr-blue}{S.#1}}}
\newcommand{\lectureref}[1]{\texttt{\textcolor{hsr-lakegreen}{L.#1}}}
%    \end{macrocode}

%    \subsection{Default theming}
%    \begin{macrocode}
%% Theming for hyperref and listings ((
\hypersetup{
    colorlinks=true,
    linkcolor=hsr-black,
    citecolor=hsr-mauve,
    filecolor=hsr-black,
    urlcolor=hsr-blue,
}

%% Common listings settings
\lstdefinestyle{hsr-base}{
    belowcaptionskip=\baselineskip,
    breaklines=true,
    frame=none,
    inputencoding=utf8,
    % margin
    xleftmargin=\parindent,
    % numbers
    numbers=left,
    numbersep=5pt,
    numberstyle=\ttfamily\footnotesize\color{hsr-black40},
    % background
    backgroundcolor=\color{white},
    showstringspaces=false,
    % default language
    language=[LaTeX]TeX,
    % break long lines, and show an arrow where the line was broken
    breaklines=true,
    postbreak=\mbox{\textcolor{hsr-blue}{$\hookrightarrow$}\space},
    % font
    basicstyle=\ttfamily\small,
    identifierstyle=\color{hsr-black},
    keywordstyle=\color{hsr-blue},
    commentstyle=\color{hsr-black40},
    stringstyle=\color{hsr-mauve80},
}

%% Define missing languages / aliases
\lstdefinelanguage{LaTeX}{
    language=[LaTeX]Tex
}

%% Set style
\lstset{style=hsr-base, escapechar=`}
%%))
%    \end{macrocode}

%    \subsection{Mathematics}
%    \subsubsection{Vectors}
%    \begin{macrocode}
%% Vector ((
\newcommand{\hsrvecbold}[1]{\mathbf{\bm{#1}}}
\newcommand{\hsrvecarrow}[1]{\vv{\mathrm{#1}}} % from esvect

\newcommand{\@hsrvecf}[1]{\hsrvecbold{#1}}
\ifhsr@arrowvec
    \renewcommand{\@hsrvecf}[1]{\hsrvecarrow{#1}}
\fi

\newcommand{\vc}{\@hsrvecf}
\ifhsr@dontrenew\else
    % save previous command
    \newcommand{\vaccent}{\v}
    \newcommand{\oldvec}{\vec}
    % redefine
    \renewcommand{\v}[1]{\@hsrvecf{#1}}
    \renewcommand{\vec}[1]{\@hsrvecf{#1}}
\fi
%%))

%% Unit vector ((
\newcommand{\hsruvecbold}[1]{\vec{\hat{#1}}}
\newcommand{\hsruvecarrow}[1]{\hat{\mathrm{#1}}}
\newcommand{\@hsruvecf}[1]{\hsruvecbold{#1}}
\ifhsr@arrowvec
    \renewcommand{\@hsruvecf}[1]{\hsruvecarrow{#1}}
\fi

\newcommand{\uv}[1]{\@hsruvecf{#1}}
\newcommand{\uvec}[1]{\@hsruvecf{#1}}
%%))

%% Products ((
\newcommand{\dotp}{\boldsymbol\cdot}
\newcommand{\crossp}{\boldsymbol\times}
%%))
%    \end{macrocode}

%    \subsubsection{Matrices and Tensors}
%    \begin{macrocode}
\newcommand{\mx}[1]{\bm{\mathrm{#1}}}
%    \end{macrocode}

%    \subsubsection{Equalities}
%    \begin{macrocode}
\newcommand{\heq}{\stackrel{\hat{\texttt{H}}}{=}}
%    \end{macrocode}

%    \subsection{Derivatives}
%    \subsubsection{Differentials}
%    \begin{macrocode}
\newcommand{\dd}[2][]{\mathrm{d}^{#1} #2}
\newcommand{\di}[2][]{\,\dd[#1]{#2}}
%    \end{macrocode}

%    \subsubsection{Derivatives}
%    \begin{macrocode}
\newcommand{\deriv}[3][]{\frac{\dd[#1]{#2}}{\dd[]{#3^{#1}}}}
\newcommand{\pderiv}[3][]{\frac{\partial^{#1} #2}{\partial #3^{#1}}}
%    \end{macrocode}

%    \subsubsection{Vector derivatives}
%    \begin{macrocode}
%% Gradient ((
\ifhsr@textvecdiff
    \DeclareMathOperator{\grad}{grad}
\else
    \newcommand{\grad}{\vec{\nabla}}
\fi
%% ))

%% Divergence ((
\ifhsr@textvecdiff
    \newcommand{\@hsrdivf}{div}
\else
    \newcommand{\@hsrdivf}{\vec{\nabla}\dotp}
\fi

\DeclareMathOperator{\divg}{\@hsrdivf}
\ifhsr@dontrenew\else
    \let\divsymb=\div
    \renewcommand{\div}{\operatorname{\@hsrdivf}}
\fi
%% ))

%% Curl ((
\ifhsr@textvecdiff
    \DeclareMathOperator{\curl}{curl}
\else
    \DeclareMathOperator{\curl}{\vec{\nabla}\crossp}
\fi
%% ))

%% laplacian ((
\ifhsr@textvecdiff
    \DeclareMathOperator{\laplacian}{div grad}
\else
    \DeclareMathOperator{\laplacian}{\nabla^2}
\fi

\ifhsr@textvecdiff
    \DeclareMathOperator{\vlaplacian}{div grad}
\else
    \DeclareMathOperator{\vlaplacian}{\vec{\nabla}^2}
\fi
%% ))
%    \end{macrocode}

%    \subsection{Colors}
%    \begin{macrocode}
\definecolor{hsr-blue}{HTML}{0065A3}
\definecolor{hsr-blue80}{HTML}{3384B5}
\definecolor{hsr-blue60}{HTML}{66A3C8}
\definecolor{hsr-blue40}{HTML}{99C1DA}
\definecolor{hsr-blue20}{HTML}{CCE0ED}

\definecolor{hsr-mauve}{HTML}{6E1C50}
\definecolor{hsr-mauve80}{HTML}{8B4973}
\definecolor{hsr-mauve60}{HTML}{A87796}
\definecolor{hsr-mauve40}{HTML}{C5A4B9}
\definecolor{hsr-mauve20}{HTML}{E2D2DC}

\definecolor{hsr-lakegreen}{HTML}{548C86}
\definecolor{hsr-lakegreen80}{HTML}{76A39E}
\definecolor{hsr-lakegreen60}{HTML}{98BAB6}
\definecolor{hsr-lakegreen40}{HTML}{BBD1CF}
\definecolor{hsr-lakegreen20}{HTML}{DDE8E7}

\definecolor{hsr-reed}{HTML}{7B6951}
\definecolor{hsr-reed80}{HTML}{958774}
\definecolor{hsr-reed60}{HTML}{B0A597}
\definecolor{hsr-reed40}{HTML}{CAC3B9}
\definecolor{hsr-reed20}{HTML}{E5E1DC}

\definecolor{hsr-petrol}{HTML}{00738D}
\definecolor{hsr-petrol80}{HTML}{338FA4}
\definecolor{hsr-petrol60}{HTML}{66ABBB}
\definecolor{hsr-petrol40}{HTML}{99C7D1}
\definecolor{hsr-petrol20}{HTML}{CCE3E8}

\definecolor{hsr-basswood}{HTML}{BABD5D}
\definecolor{hsr-basswood80}{HTML}{C8CA7D}
\definecolor{hsr-basswood60}{HTML}{D6D79E}
\definecolor{hsr-basswood40}{HTML}{E3E5BE}
\definecolor{hsr-basswood20}{HTML}{F1F2DF}

\definecolor{hsr-lightgrey}{HTML}{C6C7C8}
\definecolor{hsr-lightgrey80}{HTML}{D1D2D3}
\definecolor{hsr-lightgrey60}{HTML}{DDDDDE}
\definecolor{hsr-lightgrey40}{HTML}{E8E8E9}
\definecolor{hsr-lightgrey20}{HTML}{F4F4F4}

\definecolor{hsr-black}{HTML}{1A171B}
\definecolor{hsr-black80}{HTML}{484549}
\definecolor{hsr-black60}{HTML}{767476}
\definecolor{hsr-black40}{HTML}{A4A2A4}
\definecolor{hsr-black20}{HTML}{D1D1D1}
%    \end{macrocode}

%    \iffalse
%    \begin{macrocode}
%&lt;/package&gt;
%    \end{macrocode}
%    \fi
%
%\Finale
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