
theorem
  for a, b being Ordinal st 1 in b holds b -leading_coeff (exp(b,a)) = 1
proof
  let a, b be Ordinal;
  assume A1: 1 in b;
  thus b -leading_coeff (exp(b,a))
     = b -leading_coeff (1 *^ exp(b,a)) by ORDINAL2:39
    .= 1 by A1, Th57;
end;
