theorem Th146: :: GLIB_006:142

for G2 being _Graph
for v1, e being object
for v2 being Vertex of G2
for G1 being addAdjVertex of G2,v1,e,v2
for w being Vertex of G1 st not e in the_Edges_of G2 & not v1 in the_Vertices_of G2 & w = v1 holds
w is endvertex