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The wheel classes in the locally finite homology of GLn(Z), canonical integrals and zeta values

Abstract:
We compute the canonical integrals associated to wheel graphs, and prove that they are proportional to odd zeta values. From this we deduce that wheel classes define explicit non-zero classes in: the locally finite homology of the general linear group GLn(Z) in both odd and even ranks, the homology of the moduli space of tropical curves, and the moduli space of tropical abelian varieties. We deduce the canonical integrals of a doubly infinite family of auxiliary classes in the even commutative graph complex. The proof also leads to a formula for the complete anti-symmetrisation of a product of 2n − 1 matrices of rank n, in the spirit of the Amitsur-Levitzki theorem.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.2140/gt.2025.29.4389

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Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Oxford college:
All Souls College
Role:
Author
ORCID:
0000-0002-9295-2572


Publisher:
Mathematical Sciences Publishers
Journal:
Geometry and Topology More from this journal
Volume:
29
Issue:
8
Pages:
4389-4447
Publication date:
2025-11-26
Acceptance date:
2025-03-14
DOI:
EISSN:
1364-0380
ISSN:
1465-3060


Language:
English
Keywords:
Pubs id:
2100683
Local pid:
pubs:2100683
Deposit date:
2025-03-27

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