reserve X,Y for set;
reserve R for domRing-like commutative Ring;
reserve c for Element of R;

theorem Th24:
  for Amp being AmpleSet of R holds 0.R is Element of Amp
proof
  let Amp be AmpleSet of R;
  consider A being Element of Amp such that
A1: A is_associated_to 0.R by Th22;
  0.R divides A by A1;
  then ex D being Element of R st 0.R * D = A;
  hence thesis;
end;
