def __rmul__(self, y): return g.mul (y, self)
def __neg__(self): return g.mul(self, -1)
def __mul__(self, y): return g.mul (self, y)
def __rmul__(self, s): return g.mul(s, self)
def __rmul__(self, y): return g.mul(y, self)
def __mul__(self, y): return g.mul(self, y)