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Tilting subcategories with respect to cotorsion triples in abelian categories

Part of: Commutative algebra: Homological methods Homological algebra

Published online by Cambridge University Press:  28 June 2017

Zhenxing Di ,
Jiaqun Wei ,
Xiaoxiang Zhang  and
Jianlong Chen
Zhenxing Di
Affiliation:
Department of Mathematics, Northwest Normal University, Lanzhou 730070, People's Republic of China ([email protected])
Jiaqun Wei
Affiliation:
Institute of Mathematics, School of Mathematical Sciences, Nanjing Normal University, Nanjing 210023, People's Republic of China ([email protected])
Xiaoxiang Zhang
Affiliation:
Department of Mathematics, Southeast University, Nanjing 210096, People's Republic of China ([email protected]; [email protected])
Jianlong Chen
Affiliation:
Department of Mathematics, Southeast University, Nanjing 210096, People's Republic of China ([email protected]; [email protected])
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Extract

Given a non-negative integer n and a complete hereditary cotorsion triple , the notion of subcategories in an abelian category is introduced. It is proved that a virtually Gorenstein ring R is n-Gorenstein if and only if the subcategory of Gorenstein injective R-modules is with respect to the cotorsion triple , where stands for the subcategory of Gorenstein projectives. In the case when a subcategory of is closed under direct summands such that each object in admits a right -approximation, a Bazzoni characterization is given for to be . Finally, an Auslander–Reiten correspondence is established between the class of subcategories and that of certain subcategories of which are -coresolving covariantly finite and closed under direct summands.

Keywords

cotorsion tripletilting subcategoryBazzoni's characterizationpartial orderAuslander–Reiten correspondence

MSC classification

Secondary: 13D05: Homological dimension 13D07: Homological functors on modules (Tor, Ext, etc.) 18G15: Ext and Tor, generalizations, Künneth formula 18G25: Relative homological algebra, projective classes
Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh Section A: Mathematics , Volume 147 , Issue 4 , August 2017 , pp. 703 - 726
Copyright
Copyright © Royal Society of Edinburgh 2017 

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