reserve x,y for object, X for set;

theorem Th26:
  for L be non empty ZeroStr, p being Polynomial of L st 0 <= deg
  p holds p is non-zero
proof
  let L be non empty ZeroStr, p being Polynomial of L;
  assume 0 <=deg p;
  then deg p <> -1;
  then p <>0_.L by HURWITZ:20;
  hence thesis by UPROOTS:def 5;
end;
