theorem Th75:
 for S be with_non-empty_values Mem-Struct over N
 for p being FinPartState of S holds p in FinPartSt S
proof
  let S be with_non-empty_values Mem-Struct over N;
  let p be FinPartState of S;
   p in sproduct the_Values_of S by CARD_3:103;
  hence thesis;
end;
