===== Directed graph =====
==== Set ====
| @#55CCEE: context     | @#55CCEE: $ V,E $ ... set |
| @#FFBB00: definiendum | @#FFBB00: $ \langle V,\langle E,\psi\rangle\rangle \in \mathrm{it}(E,V) $ |
| @#55EE55: postulate   | @#55EE55: $ \psi $ ... function |
| @#55EE55: postulate   | @#55EE55: $ \mathrm{dom}(\psi)=E $ |
| @#55EE55: postulate   | @#55EE55: $ \forall (e\in E).\ \exists (u,v\in V).\ \psi(e) = \langle v,u \rangle $ |

==== Discussion ====
==== Parents ====
=== Subset of ===
[[Graph]]
=== Context ===
[[Function]]