Notes on the arithmetic of Hilbert modular forms

Abstract

The purpose of this semi-expository article is to give another proof of a classical theorem of Shimura on the critical values of the standard L-function attached to a Hilbert modular form. Our proof is along the lines of previous work of Harder and Hida (independently). What is different is an organizational principle based on the period relations proved by Raghuram and Shahidi for periods attached to regular algebraic cuspidal automorphic representations. The point of view taken in this article is that one need only prove an algebraicity theorem for the most interesting L-value, namely, the central critical value of the L-function of a sufficiently general type of a cuspidal automorphic representation. The period relations mentioned above then gives us a result for all critical values. To transcribe such a result into a more classical context we also discuss the arithmetic properties of the dictionary between holomorphic Hilbert modular forms and automorphic representations of GL(2) over a totally real number field F.

To appear in the Journal of the Ramanujan Mathematical Society

Cited by in corpus (13)

• On the order of vanishing of newforms at cusps
• Arithmeticity for periods of automorphic forms
• On Period Relations for Automorphic L-functions II
• Equidistribution of signs for Hilbert modular forms of half-integral weight
• On the arithmetic of Shalika models and the critical values of $L$-functions for $\mathrm{GL}(2n)$
• The nonvanishing hypothesis at infinity for Rankin-Selberg convolutions
• Fields of Rationality of Cusp Forms
• Endoscopy and the cohomology of GL(n)
• Ratios of periods for tensor product motives
• Supercuspidal ramifications and traces of adjoint lifts at good primes
• Determining Hilbert Modular Forms by Central Values of Rankin-Selberg Convolutions: The Level Aspect
• Non-vanishing of Rankin-Selberg Convolutions for Hilbert Modular Form
• On symmetric power L-invariants of Iwahori level Hilbert modular forms