- https://github.com/MarcoForte/closed-form-matting/blob/master/closed_form_matting/closed_form_matting.py
- https://github.com/vadimkantorov/fastcontextlocnet/blob/fcn/spectral.py
- https://github.com/pymatting/pymatting
- http://people.csail.mit.edu/alevin/papers/Matting-Levin-Lischinski-Weiss-PAMI.pdf
- http://people.csail.mit.edu/alevin/papers/spectral-matting-levin-etal-pami08.pdf
- https://blog.flaport.net/solving-sparse-linear-systems-in-pytorch.html
- https://github.com/scikit-learn/scikit-learn/blob/7f9bad99d6e0a3e8ddf92a7e5561245224dab102/sklearn/manifold/_spectral_embedding.py#L346
- https://github.com/pyamg/pyamg-examples/blob/main/readme.md
- https://man7.org/linux/man-pages/man5/ltrace.conf.5.html
- https://github.com/gnu-octave/octave/blob/default/liboctave/numeric/lo-arpack-proto.h#L4