theorem Th147: :: GLIB_006:143

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