let G1 be _Graph; :: thesis: for G2 being G1 -Disomorphic _Graph
for G3 being DGraphComplement of G1
for G4 being DGraphComplement of G2 holds G4 is G3 -Disomorphic
let G2 be G1 -Disomorphic _Graph; :: thesis: for G3 being DGraphComplement of G1
for G4 being DGraphComplement of G2 holds G4 is G3 -Disomorphic
let G3 be DGraphComplement of G1; :: thesis: for G4 being DGraphComplement of G2 holds G4 is G3 -Disomorphic
let G4 be DGraphComplement of G2; :: thesis: G4 is G3 -Disomorphic
set G5 = the DSimpleGraph of G1;
set G6 = the DSimpleGraph of G2;
the DSimpleGraph of G2 is the DSimpleGraph of G1 -Disomorphic by GLIB_010:174;
hence G4 is G3 -Disomorphic by Th83; :: thesis: verum