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by jksk61 1003 days ago
well, for lean I know there's a discord (with a fair amount of experts) and a fair share of resources nowadays. However, I did try 3 years ago and the jump between solving a simple algebra proof and contributing to Mathlib (or even understand something in it), is quite high.

Coq is well designed/easy to understand but it is missing a core mathlib like Lean. Moreover, most proofs are designed to "compile" quickly and not to be human readable.