 reserve x for Real,
    p,k,l,m,n,s,h,i,j,k1,t,t1 for Nat,
    X for Subset of REAL;

theorem
  for i,j,h being natural Number st i <> 0 & h = j*i holds j <= h
proof
  let i,j,h be natural Number;
  assume i<>0;
  then consider k such that
A1: i = k+1 by Th6;
  assume h=j*i;
  then h=j*k+j*1 by A1;
  hence thesis by Th11;
end;
