C-inf soft sparsity engine maths and code from 1972

The code is standard Fortran subroutines, updated from 1973, that compile perfectly using gfortran on any modern Linux. There is also a wrapper than makes it easy to call directly from gnu Octave. I had several AIs go over the code and math, and they all indicate that it is extremely relevant for modern ML and AI. I posted the code on Zenodo and GitHub, and will be posting the math there too. By the way, the Hugging Chat did the best job analyzing the maths and code of all the AIs tried (Claude, Bing, Gemini): it did an impressive job.