Lie algebras;
Integral forms;
Integral bases;
Map algebras;
Straightening identity;
FINITE-DIMENSIONAL REPRESENTATIONS;
LOOP ALGEBRAS;
D O I:
10.1016/j.jalgebra.2012.11.046
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
Given a finite-dimensional, simple Lie algebra g over C and A, a commutative, associative algebra with unity over C, we exhibit an integral form for the universal enveloping algebra of the map algebra, U(g circle times A), and an explicit Z-basis for this integral form. We also produce explicit commutation formulas in the universal enveloping algebra of sl(2) circle times A that allow us to write certain elements in Poincare-Birkhoff-Witt order. (C) 2012 Elsevier Inc. All rights reserved.
机构:
Univ Fed Minas Gerais, Inst Ciencias Exatas, Dept Matemat, Av Antonio Carlos 6627, Belo Horizonte, MG, BrazilUniv Fed Minas Gerais, Inst Ciencias Exatas, Dept Matemat, Av Antonio Carlos 6627, Belo Horizonte, MG, Brazil
Rodriguez, Jose L. Vilca
Schneider, Csaba
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机构:
Univ Fed Minas Gerais, Inst Ciencias Exatas, Dept Matemat, Av Antonio Carlos 6627, Belo Horizonte, MG, BrazilUniv Fed Minas Gerais, Inst Ciencias Exatas, Dept Matemat, Av Antonio Carlos 6627, Belo Horizonte, MG, Brazil
Schneider, Csaba
Usefi, Hamid
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h-index: 0
机构:
Mem Univ Newfoundland, Dept Math & Stat, St John, NL A1C 5S7, CanadaUniv Fed Minas Gerais, Inst Ciencias Exatas, Dept Matemat, Av Antonio Carlos 6627, Belo Horizonte, MG, Brazil