Depends what the authors upload. You can just upload a PDF. But if arXiv detects that the PDF came out of pdflatex it will pretty instantly nag you to give it t

Depends what the authors upload. You can just upload a PDF. But if arXiv detects that the PDF came out of pdflatex it will pretty instantly nag you to give it the TeX sources. It will then render the PDF itself and also offer the sources for download. That is also how astro-ph-leaks [1] works. [1] https://twitter.com/LeaksPh https://twitter.com/LeaksPh