Decomposition Spaces and Incidence (Co)Algebras .

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Title:	Decomposition Spaces and Incidence (Co)Algebras .
Author:	Gálvez Carrillo, Maria Immaculada
Other authors:	Universitat Politècnica de Catalunya. Departament de Matemàtiques; Universitat Politècnica de Catalunya. GEOMVAP - Geometria de Varietats i Aplicacions
Abstract:	Decomposition spaces are simplicial 88 -groupoids with an exactness property giving coherent associativity of its objective incidence (co)algebra. Our theory encompasses the Connes–Kreimer algebra, (derived) Hall algebras and Möbius inversion. This note describes joint work with J. Kock (Universitat Autònoma de Barcelona) and A. Tonks (Leicester)
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Matemàtiques i estadística::Topologia::Topologia algebraica -Algebraic Topology -Topologia algebraica
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Document type:	Article - Published version Conference Object
Published by:	Birkhäuser Verlag
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