Global divisibility conjecture for Heegner points and Tamagawa numbers

From papers

Let E/QE_{/\mathbb{Q}} be an elliptic curve of conductor NN, let KK be the quadratic imaginary field associated with a Heegner discriminant, and let yKE(K)y_K\in E(K) be the corresponding Heegner point. For an odd prime pp, assume

pNp\nmid N

and that the mod-pp Galois representation

ρE,p:Gal(Q/Q)GL(E[p])\rho_{E,p}:\operatorname{Gal}(\overline{\mathbb{Q}}/\mathbb{Q})\longrightarrow\operatorname{GL}(E[p])

is surjective, equivalently Gal(Q(E[p])/Q)GL2(Fp)\operatorname{Gal}(\mathbb{Q}(E[p])/\mathbb{Q})\cong\operatorname{GL}_2(\mathbb{F}_p). Let mm_\infty be the non-negative integer measuring the global pp-divisibility of the Heegner points used in Kolyvagin's construction, and let cqc_q be the Tamagawa number of EE at qq. Global divisibility conjecture. If pp satisfies this hypothesis, then

m=ordp(qNcq).m_\infty=\operatorname{ord}_p\left(\prod_{q\mid N}c_q\right).

This is the reformulation of the Birch and Swinnerton-Dyer formula obtained by comparing Kolyvagin's formula for the pp-primary part of \cyrX(E/K){\cyr X}(E/K) with the conjectural Tamagawa correction factor. The conjecture concerns the relationship between global divisibility of Heegner points and local Tamagawa numbers, and remains open in the source.

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Sources & referencesView supporting material

Primary source

Dimitar P. Jetchev, “Global Divisibility of Heegner Points and Tamagawa Numbers”, arXiv:math/0703431 (2007).

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