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Iterated Shimura integrals. (English) Zbl 1215.11052
Summary: In this paper I continue the study of iterated integrals of modular forms and noncommutative modular symbols for \(\Gamma \subset \text{SL}(2,\mathbb Z)\) started in [Iterated integrals of modular forms and noncommutative modular symbols. Prog. Math. 253, 565–597 (2006; Zbl 1184.11019)]. Main new results involve a description of the iterated Shimura cohomology and the image of the iterated Shimura cocycle class inside it. The concluding section of the paper contains a concise review of the classical modular symbols for \(\text{SL}(2)\) and a discussion of open problems.

MSC:
11F67 Special values of automorphic \(L\)-series, periods of automorphic forms, cohomology, modular symbols
11M55 Relations with noncommutative geometry
11G55 Polylogarithms and relations with \(K\)-theory
11M32 Multiple Dirichlet series and zeta functions and multizeta values
Citations:
Zbl 1184.11019
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