
theorem Th53:
for C being clique SimpleGraph, u, v being set
 st u in Vertices C & v in Vertices C holds {u, v} in C
proof
 let C be clique SimpleGraph, u, v be set such that
A1: u in Vertices C and
A2: v in Vertices C;
   C = CompleteSGraph Vertices C by Def13;
  hence thesis by A1,A2,Th34;
end;
