Hey, how can I express a matrix rotation as a vector x matrix operation? So with an input matrix A (NxN), flattening it to a vector 1xN^2 and then multiplying it by an (N^2 x N^2) transformation matrix and then reshaping the result back to NxN
as in what form would the N^2 x N^2 matrix have for say rotation theta.
So say I wanted to rotate a 3x3 matrix (A) by 90 degrees. For some specific reasons, I want to express this rotation as vec^-1(vec(A).T) where vec just converts A to a 9x1 vector and vec^-1 reshapes it back to a 3x3. I can manually find the values of T to do a specific rotation,…
