COHOMOLOGY OF THE SIEGEL MODULAR GROUP OF DEGREE-2 AND LEVEL-4

Authors
HOFFMAN JW WEINTRAUB SH
Citation
Jw. Hoffman et Sh. Weintraub, COHOMOLOGY OF THE SIEGEL MODULAR GROUP OF DEGREE-2 AND LEVEL-4, Memoirs of the American Mathematical Society, 133(631), 1998, pp. 59
Citations number
28
Categorie Soggetti
Mathematics,Mathematics
Journal title
Memoirs of the American Mathematical Society → ACNP
ISSN journal
00659266
Volume
133
Issue
631
Year of publication
1998
Database
ISI
SICI code
0065-9266(1998)133:631<59:COTSMG>2.0.ZU;2-3
Abstract
We compute the cohomology of the principal congruence subgroup Gamma(2 )(4) subset of Sp(4)(Z) consisting of matrices gamma = 1 mod 4. This i s done by computing the cohomology of the moduli space M-4. We determi ne the mixed Hedge structure on this cohomology, as well as the inters ection cohomology of the Satake compactification of M-4.