Spectral Methods for Nonlinear Systems

[avik-pal]

• Accelerated DF-SANE https://arxiv.org/pdf/2104.13447.pdf
• DF-SAUNE for Under-determined LS Problems https://www.scielo.br/j/cam/a/6nML5bXvthQ7nKRpFSjqyjH/?lang=en

#345 sets up spectral methods in a nicer way but it would be nice to have these extensions.