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

theorem
  for m being Integer
  for x,y,z being positive Integer st
  x/y + y/z + z/x = m & x,y,z are_mutually_coprime holds
  x = 1 & y = 1 & z = 1 by Th108;
