Equivariant group presentations and the second homology group of the Torelli group
- Award ID(s):
- 1811322
- PAR ID:
- 10295305
- Date Published:
- Journal Name:
- Mathematische Annalen
- Volume:
- 376
- Issue:
- 1-2
- ISSN:
- 0025-5831
- Page Range / eLocation ID:
- 227 to 241
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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null (Ed.)We first develop some basic facts about hypergeometric sheaves on the multiplicative group [Formula: see text] in characteristic [Formula: see text]. Certain of their Kummer pullbacks extend to irreducible local systems on the affine line in characteristic [Formula: see text]. One of these, of rank [Formula: see text] in characteristic [Formula: see text], turns out to have the Conway group [Formula: see text], in its irreducible orthogonal representation of degree [Formula: see text], as its arithmetic and geometric monodromy groups.more » « less