Murty–Patankar splitting conjecture for absolutely simple abelian varieties

Let XX be an absolutely simple abelian variety over a number field KK. Say that a prime of KK is a splitting prime for XX when the reduction of XX at that prime is not simple. Murty–Patankar's splitting conjecture. The set of primes of KK where XX splits has positive density if and only if EndKˉ(X)\operatorname{End}_{\bar K}(X) is noncommutative.

This conjecture predicts that positive-density splitting of an absolutely simple abelian variety is governed precisely by whether its geometric endomorphism ring is noncommutative. The supplied text gives no resolution, so its status remains open.

Sources & referencesView supporting material

Primary source

Jeff Achter, “Split reductions of simple abelian varieties”, arXiv:0806.4421 (2009).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.