A new characterization of silting subcategories in the stable category of a Frobenius extriangulated category

Abstract

We give a new characterization of silting subcategories in the stable category of a Frobenius extriangulated category, generalizing the result of Di, Liu, Wang and Wei (J. Algebra 525 (2019) 42–63) about the Auslander-Reiten type correspondence for silting subcategories over triangulated categories. More specifically, for any Frobenius extriangulated category , we establish a bijective correspondence between silting subcategories of the stable category and certain covariantly finite subcategories of . As a consequence, a characterization of silting subcategories in the stable category of a Frobenius exact category is given. This result is applied to homotopy categories over abelian categories with enough projectives, derived categories over Grothendieck categories with enough projectives, and to the stable category of Gorenstein projective modules over a ring R.