reserve a, b, c, d, e for Complex;

theorem Th59: :: REAL_2'33_2
  1 / a = 1 / b implies a = b
proof
  assume 1/a=1/b;
  then a"=1/b by Lm4;
  then a" = b" by Lm4;
  hence thesis by Lm12;
end;
