We study the case in which eigenvalues and elementary divisors of a Cartan matrix of a p-block B of a finite group coincide. In several cases we prove the coincidence occurs if and only if the Perron-Frobenius eigenvalue of the Cartan matrix is equal to the order of a defect group of B. 2002 Elsev
Finite Quantum Groups and Cartan Matrices
✍ Scribed by Nicolás Andruskiewitsch; Hans-Jürgen Schneider
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 296 KB
- Volume
- 154
- Category
- Article
- ISSN
- 0001-8708
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✦ Synopsis
We consider a class of Hopf algebras having as an invariant a generalized Cartan matrix. For a Hopf algebra of this kind, we prove that it is finite dimensional if and only if its generalized Cartan matrix is actually a finite Cartan matrix (under some mild hypothesis). These results allow us to classify all the finite dimensional coradically graded pointed Hopf algebras whose coradical has odd prime dimension p. We also characterize coradically graded pointed Hopf algebras of order p 4 . 2000
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