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Theoretical issues and applications of the Selberg, Arthur and relative trace formulas

24 votes

What is the matter with Hecke operators?

To keep things simple, let $G$ be a finite group and $K$ a subgroup of it. The simplest definition of the Hecke algebra associated to this pair $(G, K)$ is that it is the algebra of $G$-endomorphisms …
Qiaochu Yuan's user avatar