This question from March 2020 points out that many questions/answers link to papers at the http://front.math.ucdavis.edu/ frontend instead of at the arXiv itself, but that the frontend had been down a few weeks. There are c.600 affected questions and it looks like a large proportion of the links...

I've reviewed your request and - while I'd generally want to say "yes, we can do this" - in this case, I'm sorry to say that I don't think it will be possible - at least, not without some effort from you all first. I really do think it's important that the links on this site are functional, so I ...

Yes, this is a very active area -- one of the major themes of current research in number theory. Much of the recent work has focussed on proving something slightly weaker, but easier to get at, than modularity. An elliptic curve $E$ over a number field $K$ is said to be potentially modular if t...

Let $(V,\Phi)$ be a root system with dual root system $(V^{\ast},\Phi^{\vee})$. Let $\Delta = \{\alpha_1, ... , \alpha_n\}$ be a set of simple roots for $V$, and let $\Delta^{\vee} = \{\alpha_1^{\vee}, ... , \alpha_n^{\vee}\}$ be the coroots corresponding to $\Delta$. We have the fundamental ...