reserve X for set;
reserve a,b,c,k,m,n for Nat;
reserve i for Integer;
reserve r for Real;
reserve p for Prime;

theorem Th3: :: search in MML
  for a,b,c being Integer st a*b divides c holds a divides c & b divides c
  proof
    let a,b,c be Integer;
    a divides a*b & b divides a*b;
    hence thesis by INT_2:9;
  end;
