Relative Functoriality and Functional Equations via Trace Formulas

Research output: Contribution to journalArticle

Abstract

Langlands’ functoriality principle predicts deep relations between the local and automorphic spectra of different reductive groups. This has been generalized by the relative Langlands program to include spherical varieties, among which reductive groups are special cases. In the philosophy of Langlands’ “beyond endoscopy” program, these relations should be expressed as comparisons between different trace formulas, with the insertion of appropriate L-functions. The insertion of L-functions calls for one more goal to be achieved: the study of their functional equations via trace formulas. The goal of this article is to demonstrate this program through examples, indicating a local-to-global approach as in the project of endoscopy. Here, scalar transfer factors are replaced by “transfer operators” or “Hankel transforms” which are nice enough (typically, expressible in terms of usual Fourier transforms) that they can be used, in principle, to prove global comparisons (in the form of Poisson summation formulas). Some of these examples have already appeared in the literature; for others, the proofs will appear elsewhere.

Original languageEnglish (US)
Pages (from-to)351-389
Number of pages39
JournalActa Mathematica Vietnamica
Volume44
Issue number2
DOIs
StatePublished - Jun 15 2019

All Science Journal Classification (ASJC) codes

  • Mathematics(all)

Keywords

  • Beyond endoscopy
  • Langlands program
  • Trace formula

Fingerprint Dive into the research topics of 'Relative Functoriality and Functional Equations via Trace Formulas'. Together they form a unique fingerprint.

Cite this