"Subconvexity for Twisted L-Functions on GL(3) × GL(2) and GL(3)" by Soumendra Ganguly
 

Document Type

Lecture

Publication Date

11-16-2022

Abstract

Let φ be the symmetric-square lift of an SL₂(ℤ) Hecke-Maass form. Let q be an odd cube-free positive integer, and let χ be a primitive Dirichlet character modulo q such that χ is not quadratic. Let f be an even Hecke-normalized Hecke-Maass newform of level dividing q, central character X̄², and spectral parameter tf. We show the following subconvexity bounds for twisted L-functions on GL(3) × GL(2) and GL(3): for any ε > 0, L(1/2, φ × f × χ) ≪ (q⁵/₄ + ε), and L(1/2 + it, φ × χ) ≪ (q⁵/₈ + ε), where the implied constants depend polynomially on t and tf.

Relational Format

presentation

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