## Algebra & Number Theory

### Noncommutative Hilbert modular symbols

Ivan Horozov

#### Abstract

The main goal of this paper is to construct noncommutative Hilbert modular symbols. However, we also construct commutative Hilbert modular symbols. Both the commutative and the noncommutative Hilbert modular symbols are generalizations of Manin’s classical and noncommutative modular symbols. We prove that many cases of (non)commutative Hilbert modular symbols are periods in the Kontsevich–Zagier sense. Hecke operators act naturally on them.

Manin defined the noncommutative modular symbol in terms of iterated path integrals. In order to define noncommutative Hilbert modular symbols, we use a generalization of iterated path integrals to higher dimensions, which we call iterated integrals on membranes. Manin examined similarities between noncommutative modular symbol and multiple zeta values in terms of both infinite series and of iterated path integrals. Here we examine similarities in the formulas for noncommutative Hilbert modular symbol and multiple Dedekind zeta values, recently defined by the current author, in terms of both infinite series and iterated integrals on membranes.

#### Article information

Source
Algebra Number Theory, Volume 9, Number 2 (2015), 317-370.

Dates
Received: 22 August 2013
Revised: 17 September 2014
Accepted: 26 November 2014
First available in Project Euclid: 16 November 2017

Permanent link to this document
https://projecteuclid.org/euclid.ant/1510842284

Digital Object Identifier
doi:10.2140/ant.2015.9.317

Mathematical Reviews number (MathSciNet)
MR3320846

Zentralblatt MATH identifier
1376.11031

#### Citation

Horozov, Ivan. Noncommutative Hilbert modular symbols. Algebra Number Theory 9 (2015), no. 2, 317--370. doi:10.2140/ant.2015.9.317. https://projecteuclid.org/euclid.ant/1510842284

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