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A difference formula of pp-adic height pairings via the Bloch-Kato logarithm map

Taiga Adachi, Yu Katagiri, Ryota Shii

Source record

Source: arXiv

Published: Sep 28, 2026

arXiv: 2609.35626

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Source abstract

The construction of a pp-adic height pairing for a geometric pp-adic representation of the absolute Galois group of a number field depends on a global pp-adic logarithm and on local splittings of the Hodge filtrations at the primes above pp. We study the dependence on these splittings for suitable two-dimensional symplectic self-dual representations, including self-dual twists of representations attached to even-weight newforms at non-ordinary primes not dividing the level. We express the difference between the height pairings associated with the two splittings determined by Frobenius explicitly in terms of local Bloch--Kato logarithms. As an application over Q\mathbb{Q}, we prove that at least one of the two cyclotomic pp-adic height pairings is non-trivial under the additional assumptions that the Frobenius eigenvalues at pp are distinct and the localization map at pp from the Bloch--Kato Selmer group is non-zero.

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