
theorem Th27:
  for S, T being non empty TopSpace, p being Point of [:S, T:]
  holds p`1 is Point of S & p`2 is Point of T
proof
  let S, T be non empty TopSpace, p be Point of [:S, T:];
  p in the carrier of [:S, T:];
  then p in [:the carrier of S, the carrier of T:] by BORSUK_1:def 2;
  hence thesis by MCART_1:10;
end;
