Too many math alphabets Issue

What cause too many math alphabets Issue?

When I try to submit my paper to arXiv, I meet the too many math alphabets Issue. What cause it?

According to this answer[1], this is because I used the bm package, which double the number of math alphabets while there is a sixteen math alphabets limit for Legacy LaTeX.

To solve the issue, I need to avoid use bm package. Indeed, it is better to redefine each math alphabet to cover Latin and Greek in both bold and regular weights.


  1. https://tex.stackexchange.com/a/587402/54169 ↩︎