
theorem
  for x,b being non pair set holds [<*x,b*>,xor2a] in InnerVertices
  CompStr(x,b)
proof
  let x,b be non pair set;
  InnerVertices CompStr(x,b) = {[<*x,b*>,xor2a]} by CIRCCOMB:42;
  hence thesis by TARSKI:def 1;
end;
