Generalised Euler characteristics of Selmer groups

Details Generalised Euler characteristics of Selmer groups Generalised Euler characteristics of Selmer groups

2004-04-23

arxiv.org/abs/math/0404431v2

Proc. London Math. Soc. 98(3), 2009, p. 775-796

Mathematics

Number Theory

23 pages, much updated and reorganised

Scientific paper

10.1112/plms/pdn049

Let E be an elliptic curve defined over a number field F, and let p be a prime >= 5. In this paper we study the structure of the Selmer group of E over p-adic Lie extensions $F_\infty$ of F. In particular, under certain global and local conditions on $F_\infty$ we relate the generalised $Gal(F_\infty / F)$-Euler characteristic of $Sel(E / F_\infty)$ to the generalised Euler characteristic of the Selmer group over the cyclotomic Zp-extension of F. This invariant generalises the classical Euler characteristic to the case when the rank of E(F) is positive. Moreover, we show that the global and local conditions on $F_\infty$ are satisfied for a large class of p-adic Lie extensions of F .

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