Ranks of elliptic curves with prescribed torsion over number fields (CROSBI ID 189381)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bosman, Johan ; Bruin, Peter ; Dujella, Andrej ; Najman, Filip
engleski
Ranks of elliptic curves with prescribed torsion over number fields
We study the structure of the Mordell-Weil group of elliptic curves over number fields of degree 2, 3, and 4. We show that if T is a group, then either the class of all elliptic curves over quadratic fields with torsion subgroup T is empty, or it contains curves of rank 0 as well as curves of positive rank. We prove a similar but slightly weaker result for cubic and quartic fields. On the other hand, we find a group T and a quartic field K such that among the elliptic curves over K with torsion subgroup T, there are curves of positive rank, but none of rank 0. We find examples of elliptic curves with positive rank and given torsion in many previously unknown cases. We also prove that all elliptic curves over quadratic fields with a point of order 13 or 18 and all elliptic curves over quartic fields with a point of order 22 are isogenous to one of their Galois conjugates and, by a phenomenon that we call false complex multiplication, have even rank. Finally, we discuss connections with elliptic curves over finite fields and applications to integer factorization.
elliptic curves; number elds; rank; torsion group
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Podaci o izdanju
(11)
2014.
2885-2923
objavljeno
1073-7928
10.1093/imrn/rnt013