kronecker_fns

kron_prod(A, B, R)	Computes the matrix vector product of the kronecker product of two matrices A and B times a vector r, stored as an (N_l, N_t) array R.
make_vec(R)	Function for converting a matrix of shape (N_l, N_t) into a vector of shape (N_l * N_t,).
make_mat(r, N_l, N_t)	Function for converting a vector of shape (N_l * N_t,) into an array of shape (N_l, N_t).