theorem Th53: :: GLIB_007:53

for G2 being _Graph
for v being object
for V being set
for G1 being addAdjVertexAll of G2,v,V st V c= the_Vertices_of G2 & not v in the_Vertices_of G2 holds
the_Edges_of G2 = G1 .edgesBetween (the_Vertices_of G2)