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arXiv · 2401.09927

L-values of elliptic curves twisted by cubic characters

David Kurniadi Angdinata
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Abstract

Given a rational elliptic curve $ E $ of analytic rank zero, its L-function can be twisted by an even primitive Dirichlet character $ \chi $ of order $ q $, and in many cases its associated central algebraic L-value $ \mathcal{L}(E, \chi) $ is known to be integral. This paper derives some arithmetic consequences from a congruence between $ \mathcal{L}(E, 1) $ and $ \mathcal{L}(E, \chi) $ arising from this integrality, with an emphasis on cubic characters $ \chi $. These include $ q $-adic valuations of the denominator of $ \mathcal{L}(E, 1) $, determination of $ \mathcal{L}(E, \chi) $ in terms of Birch--Swinnerton-Dyer invariants, and asymptotic densities of $ \mathcal{L}(E, \chi) $ modulo $ q $ by varying $ \chi $.

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David Kurniadi Angdinata. 2024-01-18. L-values of elliptic curves twisted by cubic characters. https://arxiv.org/abs/2401.09927

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