Relative derived contravariant functors and the cohomology of groups
نویسندگان
چکیده
منابع مشابه
Opposite Categories and Contravariant Functors
The opposite category of a category, contravariant functors and duality functors are defined. Next we state the proposition (1) the objects of C, the morphisms of C, the cod-map of C, the dom-map of C, (the composition of C),the id-map of C is a category. Let us consider C. The functor C op yielding a strict category is defined by the condition (Def. 1). (Def. 1) C op = the objects of C, the mo...
متن کاملr-Costar Pair of Contravariant Functors
S. Al-Nofayee Department of Mathematics, Taif University, P.O. Box 439, Hawiah 21974, Saudi Arabia Correspondence should be addressed to S. Al-Nofayee, [email protected] Received 8 June 2012; Accepted 16 July 2012 Academic Editor: Feng Qi Copyright q 2012 S. Al-Nofayee. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use,...
متن کاملExtension functors of local cohomology modules
Let $R$ be a commutative Noetherian ring with non-zero identity, $fa$ an ideal of $R$, and $X$ an $R$--module. Here, for fixed integers $s, t$ and a finite $fa$--torsion $R$--module $N$, we first study the membership of $Ext^{s+t}_{R}(N, X)$ and $Ext^{s}_{R}(N, H^{t}_{fa}(X))$ in the Serre subcategories of the category of $R$--modules. Then, we present some conditions which ensure the exi...
متن کاملExtension functors of generalized local cohomology modules and Serre subcategories
In this paper we present several results concerning the cofiniteness of generalized local cohomology modules.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Pure and Applied Algebra
سال: 1990
ISSN: 0022-4049
DOI: 10.1016/0022-4049(90)90004-2