On Tate-Shafarevich groups of some elliptic curves
Franz Lemmermeyer
Abstract
This is an updated version of ANT-0166. Generalizing results of Stroeker and Top we show that the 2-ranks of the Tate-Shafarevich groups of the elliptic curves y2 = (x+k)(x2+k2) can become arbitrarily large. We also present a conjecture on the rank of the Selmer groups attached to rational 2-isogenies of elliptic curves.
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