(self, oth)
Homomorphism addition.
        ``oth`` is guaranteed to be a homomorphism with same domain/codomain.
Homomorphism addition.
        ``oth`` is guaranteed to be a homomorphism with same domain/codomain.
Homomorphism addition . oth is guaranteed to be a homomorphism with same domain / codomain .
def _add(self, oth):
        """
        Homomorphism addition.
        ``oth`` is guaranteed to be a homomorphism with same domain/codomain.
        """
        raise NotImplementedError
def _add ( self , oth ) : raise NotImplementedError