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Cohomology of local systems on loci of d-elliptic Abelian surfaces
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.).
2013 (English)In: The Michigan mathematical journal, ISSN 0026-2285, Vol. 62, no 4, 705-720 p.Article in journal (Refereed) Published
Abstract [en]

We consider the loci of d-elliptic curves in $M_2$, and corresponding loci of d-elliptic surfaces in $A_2$. We show how a description of these loci as quotients of a product of modular curves can be used to calculate cohomology of natural local systems on them, both as mixed Hodge structures and $\ell$-adic Galois representations. We study in particular the case d=2, and compute the Euler characteristic of the moduli space of n-pointed bi-elliptic genus 2 curves in the Grothendieck group of Hodge structures.

Place, publisher, year, edition, pages
2013. Vol. 62, no 4, 705-720 p.
National Category
Algebra and Logic
URN: urn:nbn:se:kth:diva-49336DOI: 10.1307/mmj/1387226161ISI: 000330420800003ScopusID: 2-s2.0-84892168133OAI: diva2:459532

QC 20140227. Updated from manuscript to article in journal.

Available from: 2011-11-25 Created: 2011-11-25 Last updated: 2014-02-27Bibliographically approved
In thesis
1. Topology of moduli spaces and operads
Open this publication in new window or tab >>Topology of moduli spaces and operads
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. vii, 45 p.
Trita-MAT. MA, ISSN 1401-2278 ; 13:02
National Category
urn:nbn:se:kth:diva-122389 (URN)978-91-7501-759-4 (ISBN)
Public defence
2013-05-31, Sal E2, Lindstedtsvägen 3, KTH, Stockholm, 14:00 (English)

QC 20130520

Available from: 2013-05-20 Created: 2013-05-20 Last updated: 2013-05-20Bibliographically approved

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