FindVertexCut
FindVertexCut[g] finds a smallest vertex cut of the graph g.
FindVertexCut[g, s, t] finds a smallest s-t vertex cut of the graph g.
FindVertexCut[{v->w, ...}, ...] uses rules v->w to specify the graph g.
Examples
Find the vertex cut of a graph:
FindVertexCut[CompleteGraph[5]]Please visit the official Wolfram Language Reference for more details.