The dot lanquage from graphviz is a great for drawing commutative diagrams as you can see here : commutative diagram

One can use dot language from graphviz, the Python script dot2tex to convert into LaTeX and the dot2texi.sty package to include the dot code into a LaTeX document.

\documentclass{article}
\usepackage{tikz} 
\usetikzlibrary{shapes,arrows} 
\usepackage{dot2texi}
\usepackage{amsmath,amssymb} 
\begin{document}

 \begin{dot2tex}[dot] 
  digraph T 
  {rankdir=TB;   
   ranksep=.2;  
   nodesep=.1  ;
   node [shape=none];
   1 -> 4 [dir=backward xlabel="q   "];
   1 -> 5 [label="stretch" constraint=false];
   1 -> 6 [label="respect equiv. ~ " texlbl="respect equiv. $\sim$" tailport=e headport=no constraint=false];
   4 -> 9 [constraint=false label="∃!m" texlbl="$\exists!m$"];
   5 -> 6 [constraint=false label="μ " texlbl="$\bar\mu$"] ;
   6 -> 9 [dir=back label="∩_M " texlbl="$\cap_M$"];
   1 [label="I x I" texlbl="$I\times I$"];  
   {rankdir=LR ;   rank=same 
   4 [label="M*"];
   5 [label="[0,2Π]✕[-1,1]" texlbl="$[0,2\pi]\times[-1,1]$"];
   6 [label= "R^3" texlbl="$\mathbb{R}^3$"];   }
   9 [label="M"]; }
   
   \end{dot2tex}
  \end{document}

my emacs source file

The tikzpicture environment created

dot2texi is a great package and can be used to produce very quickly a lot of diagrams in a declarative style.

The dot lanquage from graphviz is a great for drawing commutative diagrams as you can see here : commutative diagram

One can use dot language from graphviz, the Python script dot2tex to convert into LaTeX and the dot2texi.sty package to include the dot code into a LaTeX document.

\documentclass{article}
\usepackage{tikz} 
\usetikzlibrary{shapes,arrows} 
\usepackage{dot2texi}
\usepackage{amsmath,amssymb} 
\begin{document}

 \begin{dot2tex}[dot] 
  digraph T 
  {rankdir=TB;   
   ranksep=.2;  
   nodesep=.1  ;
   node [shape=none];
   1 -> 4 [dir=backward xlabel="q   "];
   1 -> 5 [label="stretch" constraint=false];
   1 -> 6 [label="respect equiv. ~ " texlbl="respect equiv. $\sim$" tailport=e headport=no constraint=false];
   4 -> 9 [constraint=false label="∃!m" texlbl="$\exists!m$"];
   5 -> 6 [constraint=false label="μ " texlbl="$\bar\mu$"] ;
   6 -> 9 [dir=back label="∩_M " texlbl="$\cap_M$"];
   1 [label="I x I" texlbl="$I\times I$"];  
   {rankdir=LR ;   rank=same 
   4 [label="M*"];
   5 [label="[0,2Π]✕[-1,1]" texlbl="$[0,2\pi]\times[-1,1]$"];
   6 [label= "R^3" texlbl="$\mathbb{R}^3$"];   }
   9 [label="M"]; }
   
   \end{dot2tex}
  \end{document}

my emacs source file

The tikzpicture environment created

dot2texi is a great package and can be used to produce very quickly a lot of diagrams in a declarative style.

The dot lanquage from graphviz is a great for drawing commutative diagrams as you can see here : [commutative diagram][1]

One can use dot language from graphviz, the Python script dot2tex to convert into LaTeX and the dot2texi.sty package to include the dot code into a LaTeX document.

\documentclass{article}
\usepackage{tikz} 
\usetikzlibrary{shapes,arrows} 
\usepackage{dot2texi}
\usepackage{amsmath,amssymb} 
\begin{document}

 \begin{dot2tex}[dot] 
  digraph T 
  {rankdir=TB;   
   ranksep=.2;  
   nodesep=.1  ;
   node [shape=none];
   1 -> 4 [dir=backward xlabel="q   "];
   1 -> 5 [label="stretch" constraint=false];
   1 -> 6 [label="respect equiv. ~ " texlbl="respect equiv. $\sim$" tailport=e headport=no constraint=false];
   4 -> 9 [constraint=false label="∃!m" texlbl="$\exists!m$"];
   5 -> 6 [constraint=false label="μ " texlbl="$\bar\mu$"] ;
   6 -> 9 [dir=back label="∩_M " texlbl="$\cap_M$"];
   1 [label="I x I" texlbl="$I\times I$"];  
   {rankdir=LR ;   rank=same 
   4 [label="M*"];
   5 [label="[0,2Π]✕[-1,1]" texlbl="$[0,2\pi]\times[-1,1]$"];
   6 [label= "R^3" texlbl="$\mathbb{R}^3$"];   }
   9 [label="M"]; }
   
   \end{dot2tex}
  \end{document}

[my emacs source file][2]

[![screencast][3]][3]

dot2texi is a great package and can be used to produce very quickly a lot of diagrams in a declarative style. [1]: https://fr.wikipedia.org/wiki/Fichier:DiagrammeCommutatifCorpsFrac.svg [2]: http://ix.io/2cLP [3]: https://i.sstatic.net/1qYjX.png

The dot lanquage from graphviz is a great for drawing commutative diagrams as you can see here : commutative diagram

One can use dot language from graphviz, the Python script dot2tex to convert into LaTeX and the dot2texi.sty package to include the dot code into a LaTeX document.

\documentclass{article}
\usepackage{tikz} 
\usetikzlibrary{shapes,arrows} 
\usepackage{dot2texi}
\usepackage{amsmath,amssymb} 
\begin{document}

 \begin{dot2tex}[dot] 
  digraph T 
  {rankdir=TB;   
   ranksep=.2;  
   nodesep=.1  ;
   node [shape=none];
   1 -> 4 [dir=backward xlabel="q   "];
   1 -> 5 [label="stretch" constraint=false];
   1 -> 6 [label="respect equiv. ~ " texlbl="respect equiv. $\sim$" tailport=e headport=no constraint=false];
   4 -> 9 [constraint=false label="∃!m" texlbl="$\exists!m$"];
   5 -> 6 [constraint=false label="μ " texlbl="$\bar\mu$"] ;
   6 -> 9 [dir=back label="∩_M " texlbl="$\cap_M$"];
   1 [label="I x I" texlbl="$I\times I$"];  
   {rankdir=LR ;   rank=same 
   4 [label="M*"];
   5 [label="[0,2Π]✕[-1,1]" texlbl="$[0,2\pi]\times[-1,1]$"];
   6 [label= "R^3" texlbl="$\mathbb{R}^3$"];   }
   9 [label="M"]; }
   
   \end{dot2tex}
  \end{document}

my emacs source file

The tikzpicture environment created

dot2texi is a great package and can be used to produce very quickly a lot of diagrams in a declarative style.