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Homological and Homotopical Aspects of Torsion Theories free ebook download

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Mathematics

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Author(s):	Apostolos Beligiannis

Date:	2007	Format:	djvu, pdf	Language:	English	ISBN/ASIN:	0821839969
Pages:	1	OCR:		Quality:		ISBN13:
Uploader:	tvladb77	Upload Date:	10/22/2019 2:17:05 PM

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In this paper the authors investigate homological and homotopical aspects of a concept of torsion which is general enough to cover torsion and cotorsion pairs in abelian categories, $t$-structures and recollements in triangulated categories, and torsion pairs in stable categories. The proper conceptual framework for this study is the general setting of pretriangulated categories, an omnipresent class of additive categories which includes abelian, triangulated, stable, and more generally (homotopy categories of) closed model categories in the sense of Quillen, as special cases. The main focus of their study is on the investigation of the strong connections and the interplay between (co)torsion pairs and tilting theory in abelian, triangulated and stable categories on one hand, and universal cohomology theories induced by torsion pairs on the other hand. These new universal cohomology theories provide a natural generalization of the Tate-Vogel (co)homology theory. The authors also study the connections between torsion theories and closed model structures, which allow them to classify all cotorsion pairs in an abelian category and all torsion pairs in a stable category, in homotopical terms. For instance they obtain a classification of (co)tilting modules along these lines. Finally they give torsion theoretic applications to the structure of Gorenstein and Cohen-Macaulay categories, which provide a natural generalization of Gorenstein and Cohen-Macaulay rings.

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Homological and Homotopical Aspects of Torsion Theories free ebook download

Category: Mathematics

Description: Click to see full description

Category:
Mathematics