theorem Th145: :: GLIB_006:141

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