Matrices whose entries are polynomials

问题

When using the sympy library, what is the most efficient way of operating with matrices whose entries are polynomials?

I tried both storing symbols and storing Poly instances as entries of a Matrix object. In each case, the performance that I get for operations like matrix multiplication seems to be an order of magnitude slower than what I get with sage.

来源：https://stackoverflow.com/questions/24931740/matrices-whose-entries-are-polynomials