Dima Pasechnik

one way or another, even if arpack-ng is not a "development" project, merely making sure no bitrot is happening requires making tests more robust. Hoping that downstream does testing for...

I just tried pyarpack on macOS, with Homebrew's openblas and boost-python3, and it builds (with cmake, I didn't try autotools yet) But I am getting errors in `make test` ```...

How do I even build/install `pyarpack` Python module ? For some reason, its sources are in `EXAMPLES/PYARPACK/`. With autotools, there is not even an option to build it. With cmake,...

OK, but what does it do with `.py` files? Or there are no `.py` parts in the `pyarpack` package?

Also, I can't see how to specify what BLAS/LAPACK to use. E.g. on macOS one might want to use OpenBLAS rather than Apple's BLAS.

> > on macOS one might want > > Never had a mac! But seems that compiler options `FFLAGS="-ff2c -fno-second-underscore"` are mandatory to build: > > https://github.com/opencollab/arpack-ng/blob/5eafea4328f1631eab28b1a20e757d1f0e21f8a6/.github/workflows/jobs.yml#L186 Maybe - note...

Eigen does not use BLAS/LAPACK, so I'm lost here.

what is `eigen` you mentioned? Is it https://eigen.tuxfamily.org/ ?

IMHO figuring out the "right" precision here is difficult; one has to do interval or ball arithmetic for a certified result. It could also be the case that one just...

My take on this that it should be possible to define a "fuzzy polytope" - a structure defined by approximate linear inequalities. Vertices will be balls, where a maximal number...