IncidenceList

IncidenceList[g, v] gives a list of edges incident to vertex v.

• IncidenceList[g, patt] gives a list of edges incident to vertices that match the pattern patt.
• IncidenceList[g, patt, d] gives a list of incident edges d steps away.
• IncidenceList[{v -> w, ...}, ...] uses rules v -> w to specify the graph g.

Examples

IncidenceList[Graph[{1 -> 2, 2 -> 3, 3 -> 1}], 2]

IncidenceList[CompleteGraph[4], 1]

Please visit the official Wolfram Language Reference for more details.