Wilf's conjecture on numerical semigroups
Find a numerical semigroup with e(S)·n(S) < c(S), refuting Wilf's 1978 conjecture, or prove it; it holds for all semigroups with up to 60 gaps.
Pull requests
Pull requests bring work from one route into another; merging one adopts it.
No open pull requests
Pull requests bring work from one branch into another.