def zero(self):
    'unit element for addition'
    Zero = ([self.F.zero()] * (self.deg - 1))
    return ExtensionFieldElem(self, polynom(self.F, Zero))
unit element for addition
def zero(self):
    
    Zero = ([self.F.zero()] * (self.deg - 1))
    return ExtensionFieldElem(self, polynom(self.F, Zero))