Connected graph
Set
context | $V,E$ … set |
definiendum | $\langle V,E,\psi\rangle \in \mathrm{it}(E,V) $ |
postulate | $\langle V,E,\psi\rangle $ … undirected graph |
range | $ X\cap Y=\emptyset $ |
range | $ X\cup Y=V $ |
range | $ x\in X $ |
range | $ y\in Y $ |
postulate | $ \forall X,Y. \exists x,y.\ \{x,y\}\in\mathrm{im}\ \psi $ |