Abstract
We develop a rank variety for finite-dimensional modules over a certain class of finite-dimensional local k-algebras, A(q,m)(n). Included in this class are the truncated polynomial algebras k[X1,..., X-m]/(X-i(n)), with k an algebraically closed field and char(k) arbitrary. We prove that these varieties characterise projectivity of modules (Dade's lemma) and examine the implications for the tree class of the stable Auslander-Reiten quiver. We also extend our rank varieties to infinitely generated modules and verify Dade's lemma in this context.
Original language | English |
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Pages (from-to) | 497-510 |
Number of pages | 14 |
Journal | Journal of Pure and Applied Algebra |
Volume | 211 |
Issue number | 2 |
Early online date | 25 Mar 2007 |
DOIs | |
Publication status | Published - Nov 2007 |
Keywords
- generalized clifford algebra
- infinitely generated modules
- support varieties
- group schemes
- lie-algebras
- cohomology
- complexity