scholarly journals Free 2-Crossed Complexes of Simplicial Algebras

2000 ◽  
Vol 5 (1) ◽  
pp. 13-22
Author(s):  
Ali MUTLU
Keyword(s):  
Simplicial Algebras

The excision theorems in Hochschild and cyclic homologies

2014 ◽  
Vol 144 (2) ◽  
pp. 305-317
Author(s):  
Guram Donadze ◽  
Manuel Ladra
Keyword(s):  
Hochschild Homology ◽  
Excision Property ◽  
Crossed Modules ◽  
Simplicial Algebras

We study the excision property for Hochschild and cyclic homologies in the category of simplicial algebras. We extend Wodzicki's notion of H-unital algebras to simplicial algebras and then show that a simplicial algebra I* satisfies excision in Hochschild and cyclic homologies if and only if it is H-unital. We use this result in the category of crossed modules of algebras and provide an answer to the question posed in the recent paper by Donadze et al. We also give (based on work by Guccione and Guccione) the excision theorem in Hochschild homology with coefficients.

The Homotopy of Simplicial Algebras

1980 ◽  
Vol 32 (6) ◽  
pp. 1411-1422 ◽  
Author(s):  
Harry Lakser
Keyword(s):  
Fundamental Group ◽  
Algebraic Structure ◽  
Group Structure ◽  
Topological Algebra ◽  
Homotopy Groups ◽  
Hard Part ◽  
The Relationship ◽  
Simplicial Algebras ◽  
Group Law

In [6] Walter Taylor investigated the relationship between the algebraic structure of a topological algebra A and the group structure of its fundamental group π1(A) and of the higher homotopy groups πn(A),n > 1. The main result is that a variety satisfies a group law λ in homotopy (that is, π1) if and only if every group in the idempotent reduct of obeys λ. (The relevant definitions are in [6] and also § 2 of this paper.) A similar result is stated for the higher homotopy groups. As Taylor points out in the introduction, the hard part of the theorem is constructing a topological algebra in whose fundamental group may fail to obey λ; indeed, in [6] this is only done in detail for the commutative law, and the proof is rather computational.

scholarly journals Morita homotopy theory for (∞,1)-categories and ∞-operads

2019 ◽  
Vol 31 (3) ◽  
pp. 661-684 ◽  
Author(s):  
Giovanni Caviglia ◽  
Javier J. Gutiérrez
Keyword(s):  
Homotopy Theory ◽  
Model Structure ◽  
Simplicial Sets ◽  
Simplicial Presheaves ◽  
Model Structures ◽  
Simplicial Algebras ◽  
Bousfield Localization

Abstract We prove the existence of Morita model structures on the categories of small simplicial categories, simplicial sets, simplicial operads and dendroidal sets, modelling the Morita homotopy theory of {(\infty,1)} -categories and {\infty} -operads. We give a characterization of the weak equivalences in terms of simplicial presheaves, simplicial algebras and slice categories. In the case of the Morita model structure for simplicial categories and simplicial operads, we also show that each of these model structures can be obtained as an explicit left Bousfield localization of the Bergner model structure on simplicial categories and the Cisinski–Moerdijk model structure on simplicial operads, respectively.

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