Sparse QR factorization

Accelerated Computing GPU-Accelerated Libraries
1

Hello everyone,

Does anyone know of a CUDA library that does QR factorization for sparse matricies, preferably sparse banded matricies?

I’m trying to do two things: solve Ax=b, and also find the determinant of A. csrlsvqr from cuSOLVER works for the first goal, but I can’t figure out how to do the second. I can calculate the determinant myself if I knew what Q and R are, but unfortunately csrlsvqr doesn’t seem to return the decomposition itself, just the final solution.

2

The ‘SuiteSparse’ library seems to have QR factorization of sparse matrix (partly) on GPU.
See suitesparse : a suite of sparse matrix software