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Twisted descent algebras and the Solomon-Tits algebra

机译:扭曲的下降代数和所罗门-山雀代数

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The notion of descent algebra of a bialgebra is lifted to the Barratt-Joyal setting of twisted bialgebras. The new twisted descent algebras share many properties with their classical counterparts. For example, there are twisted analogs of classical Lie idempotents and of the peak alaebra. Moreover, the universal twisted descent algebra is equipped with two products and a coproduct, and there is a fundamental rule linking all three. This algebra is shown to be naturally related to the geometry of the Coxeter complex of type A. (c) 2005 Elsevier Inc. All rights reserved.
机译:双代数的后代代数的概念被提升为扭曲双代数的Barratt-Joyal环境。新的扭曲下降代数与经典代数共享许多特性。例如,存在经典Lie幂等和峰值alaebra的扭曲类似物。而且,通用扭曲下降代数配备了两个乘积和一个乘积,并且存在一条将这三个乘积联系在一起的基本规则。该代数显示出与A型Coxeter络合物的几何形状自然相关。(c)2005 Elsevier Inc.保留所有权利。

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