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Simple graph
Set
$V,E$ … set |
$\langle V,E,\psi\rangle \in \mathrm{it}(E,V) $ |
$\langle V,E,\psi\rangle $ … loopless graph |
$ \psi $ … injective |
Discussion
Two vertices $\{u,v\}$ of a a simple graph are connected by at most one edge.