Turns out folks are solving PDEs in excel: https://sie.scholasticahq.com/article/4654-spreadsheet-implementation-of-numerical-and-analytical-solutions-to-some-c

Turns out folks are solving PDEs in excel: https://sie.scholasticahq.com/article/4654-spreadsheet-implementation-of-numerical-and-analytical-solutions-to-some-classical-partial-differential-equations/attachment/13946.pdf https://sie.scholasticahq.com/article/4654-spreadsheet-imple... (i knew about FFTs and special functions , but this looks fun/interesting)