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181.
文中研究了随机截断数据下的剩积限过程的振动行为,证明了其振动模的收敛速度与完全样本下经验过程振动模的收敛速度相一致。 相似文献
182.
F-V-环的广义内射性刻划 总被引:1,自引:0,他引:1
设F是含单位元的结合环R上的左Gabriel拓朴,称R是F-V-环,如果商范畴(R,F)-Mod中的所有单对象都是内射对象。本文我们利用左R-模的vN-内射性及拟内射性给出F-V-环的特征刻划。 相似文献
183.
K. Khashyarmanesh Sh. Salarian 《Proceedings of the American Mathematical Society》2004,132(8):2215-2220
In this paper we study the Annihilator Theorem and the Local-global Principle for the annihilation of local cohomology modules over a (not necessarily finite-dimensional) Noetherian Gorenstein ring.
184.
右IF-环及凝聚环的挠理论 总被引:2,自引:0,他引:2
本文研究了右IF-环的性质,证明出环R是右IF-环当且仅当R是左凝聚环,并且是平坦模;由此证明出右IF-环与左GQF-环是等价的,其次应用右IF-环研究了凝聚环的挠理论性质,证明出凝聚环与T-凝聚环的关系。 相似文献
185.
设F是含单位元的结合环R上的左Gabriel拓朴,称R是F-V-环,如果商范畴(R,F)-Mod中的所有单对象都是内射对象。本文我们利用左R-模的vN-内射性及拟内射性给出F-V-环的特征刻划。 相似文献
186.
Vyjayanthi Chari 《Advances in Mathematics》2007,216(2):811-840
We study the category of graded finite-dimensional representations of the polynomial current algebra associated to a simple Lie algebra. We prove that the category has enough injectives and compute the graded character of the injective envelopes of the simple objects as well as extensions between simple objects. The simple objects in the category are parametrized by the affine weight lattice. We show that with respect to a suitable refinement of the standard ordering on the affine weight lattice the category is highest weight. We compute the Ext quiver of the algebra of endomorphisms of the injective cogenerator of the subcategory associated to an interval closed finite subset of the weight lattice. Finally, we prove that there is a large number of interesting quivers of finite, affine and star-shaped type, as well as tame quasi-hereditary algebras, that arise from our study. 相似文献
187.
It is shown that a semiperfect ring is quasi-Frobenius if and only if every closed submodule of is non-small, where denotes the direct sum of copies of the right -module and is the first infinite ordinal.
188.
Susana A. Salamanca-Riba 《Proceedings of the American Mathematical Society》1997,125(10):3107-3117
In this paper we prove that a unitary representation of whose infinitesimal character satisfies some regularity condition is infinitesimally isomorphic to an module. This is done using similar techniques as those used by the author in earlier work.
189.
Ruy Exel 《K-Theory》1993,7(3):285-308
GivenC*-algebrasA andB and an imprimitivityA-B-bimoduleX, we construct an explicit isomorphismX
*:K
i
(A)K
i
(B), whereK
i
denotes the complexK-theory functors fori=0, 1. Our techniques do not require separability nor the existence of countable approximate identities. We thus extend to generalC*-algebras the result of Brown, Green, and Rieffel according to which, strongly Morita equivalentC*-algebras have isomorphicK-groups. The method employed includes a study of Fredholm operators on Hilbert modules.On leave from the University of São Paulo, Brazil. 相似文献
190.
Juan González-Férez 《代数通讯》2013,41(3):1078-1087
Let k be a field and X a set and P be a set of words over X. Consider the free nonunital k-algebra over X generated by the nonempty words over X and let R be the quotient of this algebra modulo the ideal generated by the words in P. R is called a “nonunital monomial algebra”. A right R-module M is said to be “firm” if M? R R → M given by m ? r? mr is an isomorphism. In this article we prove that if R is a nonunital monomial algebra, the category of firm modules is Grothendieck. 相似文献