Geodesic
Derivatives of Beilinson–Flach classes, Gross–Stark formulas and a $p$-adic Harris–Venkatesh conjecture
Documenta mathematica, Tome 28 (2023) no. 1, pp. 105-131

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We propose an alternative approach to the study of exceptional zeros from the point of view of Euler systems. As a first application, we give a new proof of a conjecture of Darmon, Lauder and Rotger regarding the computation of the L-invariant of the adjoint of a weight one modular form in terms of units and p-units. While in our previous work with Rotger the essential ingredient was the use of Galois deformations techniques, we discuss a new method exclusively using the properties of Beilinson–Flach classes. One of the key ingredients is the computation of a cyclotomic derivative of a cohomology class in the framework of Perrin-Riou theory, which can be seen as a counterpart to the earlier work of Loeffler, Venjakob, and Zerbes. In our second application, we illustrate how these techniques could lead to a better understanding of this setting by introducing a new motivic p-adic L-function whose special values encode information just about the unit of the adjoint (and not also the p-unit), in the spirit of the conjectures of Harris and Venkatesh. We further discuss conjectural connections with the arithmetic of triple products of Coleman families.
DOI : 10.4171/dm/905
Classification : 11F67, 11S40, 19F27
Mots-clés : Exceptional zeros, Gross–Stark conjectures, Beilinson–Flach classes, Harris–Venkatesh conjecture 
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     author = {\'Oscar Rivero},
     title = {Derivatives of {Beilinson{\textendash}Flach} classes, {Gross{\textendash}Stark} formulas and a $p$-adic {Harris{\textendash}Venkatesh} conjecture},
     journal = {Documenta mathematica},
     pages = {105--131},
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     year = {2023},
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Óscar Rivero. Derivatives of Beilinson–Flach classes, Gross–Stark formulas and a $p$-adic Harris–Venkatesh conjecture. Documenta mathematica, Tome 28 (2023) no. 1, pp. 105-131. doi: 10.4171/dm/905

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