Revision history [back]

I'm using sage 7.1 and this code here returns false.

M = matrix ([[sqrt(1-1/2),1/2],[1,-sqrt(1-1/2)]])
N = matrix ([[sqrt(1-1/3),1],[1/3,-sqrt(1-1/3)]])
(M*N).inverse() == N.inverse()*M.inverse()

What is going on?