reserve a,b,c,h for Integer;
reserve k,m,n for Nat;
reserve i,j,z for Integer;
reserve p for Prime;

theorem
  j <> 0 & z = i / j implies z divides i
  proof
    assume
A1: j <> 0 & z = i/j;
    take j;
    thus thesis by A1,XCMPLX_1:87;
  end;
