关于Domain范畴的若干性质

给出保逼近序的Scott连续伴随的等价刻划,在此基础上建立了几类以保逼近序的Scott连续函数为态射的Dom ain 范畴,并得到了这些范畴的一系列性质     

STML(C)范畴

本文讨论由Lsmooth拓扑分子格和(L1,L2)smooth连续的广义序同态所构成的STML(C)范畴的若干结果,利用集合套的方法给出了态射的若干性质,证明了范畴STML(C)是拓扑范畴.     

范畴中态射集减序的刻划

本文研究了范畴中态射集减序的刻划问题，其主要结果是：（１）证得一般范畴情形减序的十四种刻划；（２）将Ｍｉｔｒａ、Ｂａｋｓａｌａｒｙ等人的利用（１）－逆、（１，２）－逆的包含关系及平行和来刻划复矩阵减序的结果推广到素性预加法范畴与带对合的正性预加法范畴中；（３）给出了１９８０年Ｈａｒｔｗｉｇ关于半群减序刻划的一个反例，因此否定了这个刻画．     

STML((L))范畴

本文讨论由l-smooth拓扑分子格和（l1，l2）-smooth连续的广义序同态所构成的STML（l）范畴的若干结果，利用集合套的方法给出了态射的若干性质，证明了范畴STML（l）是拓扑范畴．     

预加法范畴中态射集星型序的刻划

本文给出了预加法范畴中态射集左（右）星序，星序的显公式刻划，证得了素性，正性预加法范畴中态射集星型序的某些刻划，把Ｈａｒｔｗｉｇ，Ｓｔｙａｎ，Ｍｉｔｒａ，Ｂａｋｓａｌａｒｙ关于复矩阵星型序刻划的有关结果推广到这两类范畴中。     

STML(L)范畴的若干结果

本文讨论了由(?)-smooth拓扑分子格和(?)-smooth连续的广义序同态所构成的STML((?)) 范畴的若干结果,证明了范畴STML((?))是拓扑范畴,范畴TML是范畴STML((?))的双反射满子范畴,以及两个伴随定理.     

一类Domain范畴及其笛卡儿闭子范畴

本文给出一类新的 Ｄｏｍａｉｎ范畴 ＡｌｇＤ■（即以代数 Ｄｏｍａｉｎ为对象,保逼近序的Ｓｃｏｔｔ连续函数为态射的范畴）及其满子范畴ＡｌｇＤ■（即以有底（最小元）的代数Ｄｏｍａｉｎ为对象,保逼近序的Ｓｃｏｔｔ连续函数为态射的范畴）,并且讨论它们的极大的笛卡儿闭的满子范畴．     

态射集中的加权星序和加权广义逆

本文推广范畴上态射集中的星序理论.引进范畴上态射集中的加权星序.利用态射集的加权广义逆来刻划态射集中的加权星序.给出了态射集中的加权星序和态射的加权广义逆之间的一些关系.得到了态射集中的加权星序的一些刻划和性质.     

完备稠序线性序拓扑空间上的奇周期轨序关系

研究完备稠序线性序拓扑空间上连续自映射的周期轨,指出当连续自映射有（2n＋1）-周期轨而没有（2n-1）-周期轨时,该（2n＋1）-周期轨上各点的序关系.利用这个关系将Sharkovskii定理从实直线推广到完备稠序线性序拓扑空间上。     

STML(し)范畴的若干结果

本文讨论了由L-smooth拓扑分子格和L-smooth连续的广义序同态所构成的STML(し)范畴的苦干结果,证明了范畴STML(し)是拓扑范畴,范畴TML是范畴STML(し)的双反射满子范畴,以及两个伴随定理.     

An equivariant tensor product on Mackey functors

For all subgroups H of a cyclic p-group G we define norm functors that build a G-Mackey functor from an H-Mackey functor. We give an explicit construction of these functors in terms of generators and relations based solely on the intrinsic, algebraic properties of Mackey functors and Tambara functors. We use these norm functors to define a monoidal structure on the category of Mackey functors where Tambara functors are the commutative ring objects.     

SEMI-TOPOLOGICAL FUNCTORS THAT INDUCE IDEMPOTENT MONADS

Abstract

The aim of this paper is to describe some “topological” subclasses of the class of all semi-topological functors. This is done by considering intersections of certain classes: on the one hand, the classes of all semi-topological functors, all topologically-algebraic functors and all regular functors; and on the other hand, the class of all discrete functors (see [6]). The relations between these and other classes of functors are given along with the necessary examples. Finally, the resulting intersections are described by giving representations of the functors that belong to them.     

Stable functors of derived equivalences and Gorenstein projective modules

From certain triangle functors, called nonnegative functors, between the bounded derived categories of abelian categories with enough projective objects, we introduce their stable functors which are certain additive functors between the stable categories of the abelian categories. The construction generalizes a previous work by Hu and Xi. We show that the stable functors of nonnegative functors have nice exactness property and are compatible with composition of functors. This allows us to compare conveniently the homological properties of objects linked by the stable functors. In particular, we prove that the stable functor of a derived equivalence between two arbitrary rings provides an explicit triangle equivalence between the stable categories of Gorenstein projective modules. This generalizes a result of Y. Kato. Our results can also be applied to provide shorter proofs of some known results on homological conjectures.     

Left-Derived Functors of the Generalized I-Adic Completion and Generalized Local Homology

We study left-derived functors of the generalized I-adic completion and compute these functors by generalized local homology functors.     

Module structures and the derived functors of iterated loop functors on unstable modules over the Steenrod algebra

The calculation of the iterated loop functors and their left derived functors on the category of unstable modules over the Steenrod algebra is a non-trivial problem; Singer constructed an explicit and functorial chain complex to calculate these functors. The results of Singer are analysed to give information on the behaviour of these functors with respect to the nilpotent filtration of the category of unstable modules.We show that, if an unstable module M supports an action of an unstable algebra K, then the derived functors of the iterated loop functors applied to M support actions of iterated doubles of K. This allows the finiteness results of Henn on unstable modules which support actions of unstable algebras to be applied to deduce structural results on the derived functors of iterated loops on such modules.     

Categories with Projective Functors

We introduce a notion of a category with full projective functors.It encodes certain common properties of categories appearingin representation theory of Lie groups, Lie algebras and quantumgroups. We describe the left or right exact functors which naturallycommute with projective functors and provide a unified approachto the verification of relations between such functors. 2000Mathematics Subject Classification 17B10.     

On the Projective Dimensions of Mackey Functors

We examine the projective dimensions of Mackey functors and cohomological Mackey functors. We show over a field of characteristic p that cohomological Mackey functors are Gorenstein if and only if Sylow p-subgroups are cyclic or dihedral, and they have finite global dimension if and only if the group order is invertible or Sylow subgroups are cyclic of order 2. By contrast, we show that the only Mackey functors of finite projective dimension over a field are projective. This allows us to give a new proof of a theorem of Greenlees on the projective dimension of Mackey functors over a Dedekind domain. We conclude by completing work of Arnold on the global dimension of cohomological Mackey functors over ?.     

Primary decompositions and morita contexts

As shown by Mueller, a Morita context (R,M,N,S) yields a one-to-one order preserving correspondence between certain torsion theories on R^Mand S^MIn addition, Goldman has defined the notions of prime kernei functors and primary modules for arbitrary associative rings. These notions lead to a type of primary decomposition for kernel functors. In this paper we show that under the above correspondence prime kernel functors correspond to prime kernel functors and primary modules correspond to primary modules. Finally we show that the above correspondence preserves the primary decomposition of kernel functors.     

Rhetorical biset functors,rational p-biset functors and their semisimplicity in characteristic zero

Rhetorical biset functors can be defined for any family of finite groups that is closed under subquotients up to isomorphism. The rhetorical p-biset functors almost coincide with the rational p-biset functors. We show that, over a field with characteristic zero, the rhetorical biset functors are semisimple and, furthermore, they admit a character theory involving primitive characters of automorphism groups of cyclic groups.     

Splitting criteria for homotopy functors of spectra

We explore the interaction between the Taylor tower and cotower, as defined in deriving calculus with cotriples and dual calculus for functors to spectra of functors of spectra. This leads to new splitting criteria which generalize the results in dual calculus for functors to spectra.