I'm writing a math paper for submission to some journal or other and section 2.1.10 of https://www.ams.org/publications/authors/AMS-StyleGuide-online.pdf says I need a Subject Classification number in the top material of my paper.
The paper is about an original formula I developed for generating Pythagorean triples and then goes on to show how to find such triples "on demand" given criteria such as side length, perimeter, area/perimeter ratio, area, product, and side differences. Indeed, the title is "On Finding Pythagorean Triples". I have looked here https://zbmath.org/classification/ and my best guess is that the number I'm looking for would begin with 11 (number theory) but that's as far as I can figure out. I don't even know the proper tag(s) for this question. Can anyone help me in my search?