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Fundamental group of Schurian categories and the Hurewicz isomorphism
- Publication Year :
- 2010
-
Abstract
- Let k be a field. We attach a CW-complex to any Schurian k-category and we prove that the fundamental group of this CW-complex is isomorphic to the intrinsic fundamental group of the k-category. This extends previous results by J.C. Bustamante. We also prove that the Hurewicz morphism from the vector space of abelian characters of the fundamental group to the first Hochschild-Mitchell cohomology vector space of the category is an isomorphism.<br />Comment: Final version to appear in Documenta Mathematica, 14 pages
- Subjects :
- Mathematics - Rings and Algebras
55Q05, 18D20, 16E40, 16W25, 16W50
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1010.6296
- Document Type :
- Working Paper