Let G be a graph and U⊂V(G) be a set of vertices. For each v∈U, let hv:U→{0,1} be the function defined by hv(u)=&1ifu∼v,u∈U0ifu⁄∼v,u∈U,and set H(U)≔{hv:v∈U}
Let G be a graph and U⊂V(G) be a set of vertices. For each v∈U, let hv:U→{0,1} be the function defined by hv(u)=&1ifu∼v,u∈U0ifu⁄∼v,u∈U,and set H(U)≔{hv:v∈U}
Let G be a graph and U⊂V(G) be a set of vertices. For each v∈U, let hv:U→{0,1} be the function defined by hv(u)=&1ifu∼v,u∈U0ifu⁄∼v,u∈U,and set H(U)≔{hv:v∈U}