Showing papers by "Alice Silverberg published in 1992"

TL;DR: In this paper, the authors give results on when homomorphisms between abelian varieties are or are not defined over fields obtained from division points on the varieties, and they show that every element of Hom(A, B) is defined over L, L F is unramified at the discrete places of good reduction for A × B, and [L : F] divides H(d, e) where H(e) is a number given by an explicit formula and is less than 4(9d 2d(9e)2d( 9e)