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Search: MSC category 18E30 ( Derived categories, triangulated categories )

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1. CJM 2000 (vol 52 pp. 225)

Alonso Tarrío, Leovigildo; Jeremías López, Ana; Souto Salorio, María José
 Localization in Categories of Complexes and Unbounded Resolutions In this paper we show that for a Grothendieck category $\A$ and a complex $E$ in $\CC(\A)$ there is an associated localization endofunctor $\ell$ in $\D(\A)$. This means that $\ell$ is idempotent (in a natural way) and that the objects that go to 0 by $\ell$ are those of the smallest localizing (= triangulated and stable for coproducts) subcategory of $\D(\A)$ that contains $E$. As applications, we construct K-injective resolutions for complexes of objects of $\A$ and derive Brown representability for $\D(\A)$ from the known result for $\D(R\text{-}\mathbf{mod})$, where $R$ is a ring with unit. Categories:18E30, 18E15, 18E35

2. CJM 1999 (vol 51 pp. 3)

Allday, C.; Puppe, V.
 On a Conjecture of Goresky, Kottwitz and MacPherson We settle a conjecture of Goresky, Kottwitz and MacPherson related to Koszul duality, \ie, to the correspondence between differential graded modules over the exterior algebra and those over the symmetric algebra. Keywords:Koszul duality, Hirsch-Brown modelCategories:13D25, 18E30, 18G35, 55U15