graph ices s cv abset of to some U 3 u2 U2 1VV)-V∈v|u∈,uv∈EU丿 A={v1,v3},N(A)={v2,v6,v4} A1={vl,v4},N(A1)={v2,v6,v4,v3, V5, V1) vs▪ Definition 40: Given a bipartite graph G(V1;V2), and a subset of vertices S V, the neighborhood N(S) is the subset of vertices of V that are adjacent to some vertex in S, i.e. ▪ N(S) ={vV|uS,{u,v}E(G)} A={v1,v3},N(A)={v2,v6,v4} A1={v1,v4},N(A1 )={v2,v6,v4,v3, v5,v1}