On: Tikz.net – Graphics with TikZ in LaTeX

[andrepd]

> you want the simplest possible way to express "connect a to b to c, and b to d, and d to c and back",

TikZ has an easy to use DSL for expressing graphs :) you can write

    \graph a -> {b, c} -> d;

and it will produce something like

    a –– b -- d
      \     /
       \ c /