===== Connected graph =====
==== Set ====
| @#55CCEE: context     | @#55CCEE: $V,E$ ... set |

| @#FFBB00: definiendum | @#FFBB00: $\langle V,E,\psi\rangle \in \mathrm{it}(E,V) $ |

| @#55EE55: postulate   | @#55EE55: $\langle V,E,\psi\rangle $ ... undirected graph |

| @#DDDDDD: range       | @#DDDDDD: $ X\cap Y=\emptyset $ |
| @#DDDDDD: range       | @#DDDDDD: $ X\cup Y=V $ |
| @#DDDDDD: range       | @#DDDDDD: $ x\in X $ |
| @#DDDDDD: range       | @#DDDDDD: $ y\in Y $ |

| @#55EE55: postulate   | @#55EE55: $ \forall X,Y. \exists x,y.\ \{x,y\}\in\mathrm{im}\ \psi $ |

==== Discussion ====
==== Parents ====
=== Subset of ===
[[Undirected graph]]