Hey! First, thanks for the awesome libraries!
I need the matricial polar decompositions for a small side project. I could not find a ready-make implementation in nalgebra. It is a simple enough algorithm to implement, given the SVD decomposition, which is already available in nalgebra.
So, this seems like an ideal first contribution to this amazing crate. I am not a specialist in Rust, so the code will require a few rounds of review before being merged.
Thus, I think that first I should ask if there is interest in having the decomposition in the codebase, and if there is interest/availability in mentoring newcomers to the community.