In case you or anyone else knows, are there other libraries that implement a high performance sparse QR? Really, I need a Q-less QR factorization for sparse ma

In case you or anyone else knows, are there other libraries that implement a high performance sparse QR? Really, I need a Q-less QR factorization for sparse matrices. As far as I know, there are only two: one comes from MKL: https://www.intel.com/content/www/us/en/developer/articles/technical/intel-mkl-sparse-qr-solver-multifrontal-sparse-qr-factorization-method-for-solving-a-sparse.html https://www.intel.com/content/www/us/en/developer/articles/t... The other comes from SPQR, which is part of SuiteSparse: https://people.engr.tamu.edu/davis/suitesparse.html https://people.engr.tamu.edu/davis/suitesparse.html Part of the issue is that SPQR is dual licensed GPL/Commercial and the last time I checked a license was not cheap. Conversely, MKL has no redistribution fee, so it's been essentially the only option for this factorization if the code can't be bundled in a way compatible with the GPL.