Year: 2023
Type: preprint
Abstract: The Harris-Venkatesh conjecture relates the action of derived Hecke operators on weight-one modular forms to algebraic units. We introduce the Harris-Venkatesh period, defined on a product of modular curves, and show that it specializes to the derived Hecke action on weight-one forms. We also define and construct optimal forms, two-variable modular forms that explicitly realize a theta lifting from the Jacquet-Langlands correspondence. Using a positive-characteristic multiplicity-one argument comparing the Harris-Venkatesh period on newforms and optimal forms, we prove the full Harris-Venkatesh conjecture for imaginary dihedral weight-one modular forms.
Source: arXiv (Cornell University)
Author: Zhang, Robin
Language: English
Subfield: Mathematical Physics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4313484278