Classification of arithmetic root systems of rank 3

Details Classification of arithmetic root systems of rank 3 Classification of arithmetic root systems of rank 3

2005-09-07

arxiv.org/abs/math/0509145v1

Mathematics

Quantum Algebra

30 pages, 2 tables, several figures

Scientific paper

The paper purposes to contribute to the classification of pointed Hopf algebras by the method of Andruskiewitsch and Schneider. The structure of arithmetic root systems is enlightened such that their relation to ordinary root systems associated to semi-simple Lie algebras becomes more astounding. As an application all arithmetic root systems of rank 3 are determined. The result gives in particular all finite dimensional rank 3 Nichols algebras of diagonal type over a field of characteristic zero. Key Words: Weyl groupoid, Hopf algebra, Nichols algebra

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