reserve X for set;
reserve a,b,c,k,m,n for Nat;
reserve i,j for Integer;
reserve r for Real;
reserve p,p1,p2 for Prime;

theorem Th34:
  m * n = 145 implies m = 1 & n = 145
                   or m = 5 & n = 29
                   or m = 29 & n = 5
                   or m = 145 & n = 1
  proof
    assume
A1: m*n = 145;
    m divides m*n;
    then m = 1 or m = 5 or m = 29 or m = 145 by A1,Th20;
    hence thesis by A1;
  end;
