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Adjacency list
Set
$V$ … countable set |
$ \phi\in\mathrm{it} $ |
$ \mathrm{dom}\ \phi = V $ |
$ v,u\in V $ |
$ \phi(v)\subseteq V $ |
$ u\in\phi(v)\implies v\in\phi(u) $ |
Discussion
The value $\phi(v)$ denotes the set of vertices which are connected to $v$.
The adjacency lists describe simple graphs.