A simple proof of the Eichler-Selberg trace formula
arXiv:1711.00327 · doi:10.1515/crelle-2018-0035
Abstract
We give a short proof of the trace formula for Hecke operators on modular forms for the modular group, using the action of Hecke operators on the space of period polynomials.
14 pages. Final version, to appear in J. Reine Angew. Math