Height pairings, exceptional zeros and Rubin's Formula: The multiplicative group

Details Height pairings, exceptional zeros and Rubin's Formula: The multiplicative group Height pairings, exceptional zeros and Rubin's Formula: The multiplicative group

2009-05-27

arxiv.org/abs/0905.4382v2

Mathematics

Number Theory

32 pages, to appear in Commentarii Math. Helvetici. May slightly differ from the final form of the paper

Scientific paper

In this paper we prove a formula, much in the spirit of one due to Rubin, which expresses the leading coefficients of various p-adic L-functions in the presence of an exceptional zero in terms of Nekovar's p-adic height pairings on his extended Selmer groups. In a particular case, the Rubin-style formula we prove recovers a p-adic Kronecker limit formula. In a disjoint case, we observe that our computations with Nekovar's heights agree with the Ferrero- Greenberg formula (more generally, Gross' conjectural formula) for the leading coefficient of the Kubota-Leopoldt p-adic L-function (resp., the Deligne-Ribet p-adic L-function) at s = 0.

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