VertexDelete
VertexDelete[g,v] makes a graph by deleting the vertex ν and all edges connected to v from the graph g.
VertexDelete[g,{v1,v2,…}] deletes a collection of vertices from g.
VertexDelete[g,patt] deletes all vertices that match the pattern patt.
VertexDelete[{v->w,…},…] uses rules v->w to specify the graph g.
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