number-theory / Arithmetic of elliptic curves; Iwasawa theory

The Birch-Swinnerton-Dyer formula in Selmer corank at most one

For every E/QE/\mathbb{Q} and prime qq with sq(E)=corank Selq∞(E/Q)∈{0,1}s_q(E)=\mathrm{corank}\,\mathrm{Sel}_{q^\infty}(E/\mathbb{Q})\in\{0,1\}: rank E(Q)=ords=1L(E,s)=sq(E)\mathrm{rank}\,E(\mathbb{Q})=\mathrm{ord}_{s=1}L(E,s)=s_q(E), Sha(E/Q)Sha(E/\mathbb{Q}) is finite, and the full BSD leading-term formula holds at every prime, with no hypotheses on reduction, torsion, isogenies, CM or residual representations. By Gross-Zagier-Kolyvagin this covers every curve of analytic rank at most one (curator's reading). The new step is the exact pp-adic valuation at every odd pp; p=2p=2 comes from the two-primary companion. With family 006 it gives full BSD for a density-one set of quadratic twists of each curve. It says nothing about analytic rank ≥2\geq 2.

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number-theorySep 24, 2026Significance 78/100Registry: unreviewed

The Birch-Swinnerton-Dyer formula in Selmer corank at most one

Prior state unknown→proved

For every E/QE/\mathbb{Q} and prime qq with sq(E)=corank Selq∞(E/Q)∈{0,1}s_q(E)=\mathrm{corank}\,\mathrm{Sel}_{q^\infty}(E/\mathbb{Q})\in\{0,1\}: rank E(Q)=ords=1L(E,s)=sq(E)\mathrm{rank}\,E(\mathbb{Q})=\mathrm{ord}_{s=1}L(E,s)=s_q(E), Sha(E/Q)Sha(E/\mathbb{Q}) is finite, and the full BSD leading-term formula holds at every prime, with no hypotheses on reduction, torsion, isogenies, CM or residual representations. By Gross-Zagier-Kolyvagin this covers every curve of analyti…

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For every E/QE/\mathbb{Q} and prime qq with sq(E)=corank Selq∞(E/Q)∈{0,1}s_q(E)=\mathrm{corank}\,\mathrm{Sel}_{q^\infty}(E/\mathbb{Q})\in\{0,1\}: rank E(Q)=ords=1L(E,s)=sq(E)\mathrm{rank}\,E(\mathbb{Q})=\mathrm{ord}_{s=1}L(E,s)=s_q(E), Sha(E/Q)Sha(E/\mathbb{Q}) is finite, and the full BSD leading-term formula holds at every prime, with no hypotheses on reduction, torsion, isogenies, CM or residual representations. By Gross-Zagier-Kolyvagin this covers every curve of analytic rank at most one (curator's reading). The new step is the exact pp-adic valuation at every odd pp; p=2p=2 comes from the two-primary companion. With family 006 it gives full BSD for a density-one set of quadratic twists of each curve. It says nothing about analytic rank ≥2\geq 2.

For every E/QE/\mathbb{Q} and prime qq with sq(E)=corank Selq∞(E/Q)∈{0,1}s_q(E)=\mathrm{corank}\,\mathrm{Sel}_{q^\infty}(E/\mathbb{Q})\in\{0,1\}: rank E(Q)=ords=1L(E,s)=sq(E)\mathrm{rank}\,E(\mathbb{Q})=\mathrm{ord}_{s=1}L(E,s)=s_q(E), Sha(E/Q)Sha(E/\mathbb{Q}) is finite, and the full BSD leading-term formula holds at every prime, with no hypotheses on reduction, torsion, isogenies, CM or residual representations. By Gross-Zagier-Kolyvagin this covers every curve of analytic rank at most one (curator's reading). The new step is the exact pp-adic valuation at every odd pp; p=2p=2 comes from the two-primary companion. With family 006 it gives full BSD for a density-one set of quadratic twists of each curve. It says nothing about analytic rank ≥2\geq 2.

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