The folklore conjecture on simultaneous rank-zero twists and Tate–Shafarevich orders

For positive integers mm and kk, consider elliptic curves over the rationals and, for a prime pp, their pp-twists. Folklore conjecture. For any positive integers mm and kk, there are pairwise non-isogenous elliptic curves E1,,EmE^1,\dots,E^m defined over the rationals such that the Mordell–Weil group of the pp-twist of each EiE^i has rank zero for a positive proportion of primes pp, and

Ш(Ei)=k2,|\text{Ш}(E^i)|=k^2,

for all i=1,,mi=1,\dots,m. This optimistic conjecture asks for arbitrarily large collections of pairwise non-isogenous curves with simultaneous positive-proportion rank-zero prime twists and prescribed square Tate–Shafarevich order; no resolution is given.

Sources & referencesView supporting material

Primary source

Andrzej Dąbrowski and Lucjan Szymaszkiewicz, “Behaviour of the order of Tate-Shafarevich groups for the quadratic twists of elliptic curves”, arXiv:1611.07840 (2016).

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