I've read the linked page and skimmed the comments and I still don't know what "PDE" is supposed to mean. From a quick search, my best guess is https://en.wiki

I've read the linked page and skimmed the comments and I still don't know what "PDE" is supposed to mean. From a quick search, my best guess is https://en.wikipedia.org/wiki/Partial_differential_equation https://en.wikipedia.org/wiki/Partial_differential_equation?