ON THE TRACE FORMULA FOR HECKE OPERATORS ON CONGRUENCE SUBGROUPS

被引:4
作者
Popa, Alexandru A. [1 ]
机构
[1] Romanian Acad, Inst Math Simion Stoilow, POB 1-764, RO-014700 Bucharest, Romania
关键词
Trace formula; Hecke operators; holomorphic modular forms; period polynomials; GROUP CO-HOMOLOGY; MODULAR-FORMS; PERIODS;
D O I
10.1090/proc/13896
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We give a new, simple proof of the trace formula for Hecke operators on modular forms for finite index subgroups of the modular group. The proof uses algebraic properties of certain universal Hecke operators acting on period polynomials of modular forms, and it generalizes an approach developed by Don Zagier and the author for the modular group. This approach leads to a very simple formula for the trace on the space of cusp forms plus the trace on the space of modular forms. As applications, we investigate what happens when one varies the weight or the level in the trace formula.
引用
收藏
页码:2749 / 2764
页数:16
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