L-fuzzy代数的刻画

鉴于[2]中已有fuzzy代数结合的不理想，谷文祥和卢荼在L－fuzzy集论中重新定义了L－fuzzy代数，得到了一些理想的结论。但却没有给出它的截集式刻画。本文的目的就是借助于L－fuzzy集的几种水平截集给出了它的几个等价刻画，使得它的表现更为直观且更便于应用。最后，作为应用，本文简洁地证明了L－fuzzy代数在代数同态下是不变的和逆不变的。     

BCI-代数的Fuzzy a-理想

本文的目的是引进PCI－代数的fuzzy α-理想的概念与探讨它的性质，给出了fuzzy α-理想的特征与Meng‘s扩张定理，讨论了BCI－代数中fuzzy α-理想，fuzzy q-理想与fuzzy p-理想之间的关系，从而得到一个BCI－代数的fuzzy子集是fuzzy α-理想当且仅当它是fuzzy q-理想与fuzzy p-理想。利用fuzzy α-理想与fuzzy p-理想分别刻画了结合BCI－代数与p-半单BCI－代数。此外，亦给出了fuzzy α-理想的其他性质。     

QF代数的Hopf代数作用

Ｈ是 Ｈｏｐｆ代数，Ａ是左 Ｈ－模代数，本文给出了当 Ａ是 ＱＦ代数时，ＡＨ也是 ＱＦ代数的一个条件．     

Kleene-Stone代数的分类及其表示

首先研究了Kleene-Stone代数的由素滤子生成的同余关系的性质，然后在此基础上给出了Kleene-Stone代数的分类，最后证明了对每个KS－n代数L(n)，存在一个商代数L(n)/-嵌入于有限的KS－n代数Ω（n)中。     

BCI-代数的换位元

本文在ＢＣＩ－代数中引入了换位元，证明了换位元的若干重要性质，讨论了换位元与极大元、极小元以及半群之间的关系．     

5维Bernstein-Jordan代数的导子代数

Ⅰ．Ｃｏｒｒｅａ和Ｌ．Ａ．Ｐｅｒｅｓｉ对实数域上的５维Ｂｅｒｎｓｔｅｉｎ－Ｊｏｒｄａｎ代数进行了分类．本文在此基础上，确定了这些代数的导子代数     

Weyl代数的表示

设Ｋ是一个域．证明了，若ｃｈＫ＝０，那么ｎ－ｔｈＷｅｙｌ代数Ａ_ｎ（ｋ）没有有限维表示．还给出了Ａ_ｎ（ｋ）的不可约Ｈａｒｉｓｈ－Ｃｈａｎｄｒａ模的分类．当Ｋ是一个特征非零的代数闭域时，给出了有限维不可约Ａ_ｎ（Ｋ）－模的分类．     

在 Yetter-Drinfel''''d范畴中ρ-Lie代数的可解理想结构

在 Ｙｅｔｔｅｒ－Ｄｒｉｎｆｅｌ’ｄ范畴中，本文研究了ρ－Ｌｉｅ代数的可解理想结构，得到了：如果Ｌ是一个 Ｈ－单的 ρ－Ｌｉｅ代数而且 Ｖ ［Ｌ，Ｌ］ρ是［Ｌ，Ｌ］ρ的一个 ρ－Ｌｉｅ理想满足 Ｖ≠［Ｌ，Ｌ］ρ那么 Ｖ是［Ｌ，Ｌ］ρ的一个可解ρ－Ｌｉｅ子代数．     

模任意子Hopf代数的商余代数的诱导作用

设 Ｈ是域 ｋ上的有限维 Ｈｏｐｆ代数，Ｋ为 Ｈ的任意子 Ｈｏｐｆ代数，Ａ是右 Ｈ－余模代数．设 ＝（Ｈ／Ｋ+ Ｈ）*和，且有 ｃ∈Ａ，ｔ ·ｃ＝１．本 文刻划了 Ａ作为 Ａ＃ *-模的投射性且证明了：如果Ａ／ＡＨ*是 Ｈ-Ｆｒｏｂｅｎｉｕｓ扩张， 则 Ａ ／ＡＨ*是 Ｋ－Ｆｒｏｂｅｎｉｕｓ扩张；如果 Ａ／ＡＨ*是 Ｈ－Ｇａｌｏｉｓ扩张，则 Ａ *／ＡＨ*是 Ｋ－Ｇａｌｏｉｓ扩张．     

关于正关联BCK代数的一种扩张

在本文中，证明了每一个正关联ＢＣＫ－代数Ｘ均可嵌入于具有条件（Ｓ）的正关联ＢＣＫ－代数Ｘ^*，且Ｘ是Ｘ^*的一个子代数．特别地，当Ｘ是关联时，那么Ｘ^*也是关联的     

Representations of MV‐algebras by sheaves

In this paper, inspired by methods of Bigard, Keimel, and Wolfenstein ([2]), we develop an approach to sheaf representations of MV‐algebras which combines two techniques for the representation of MV‐algebras devised by Filipoiu and Georgescu ([18]) and by Dubuc and Poveda ([16]). Following Davey approach ([12]), we use a subdirect representation of MV‐algebras that is based on local MV‐algebras. This allowed us to obtain: (a) a representation of any MV‐algebras as MV‐algebra of all global sections of a sheaf of local MV‐algebras on the spectruum of its prime ideals; (b) a representation of MV‐algebras, having the space of minimal prime ideals compact, as MV‐algebra of all global sections of a Hausdorff sheaf of MV‐chains on the space of minimal prime ideals, which is a Stone space; (c) an adjunction between the category of all MV‐algebras and the category of MV‐algebraic spaces, where an MV‐algebraic space is a pair (X, F), where X is a compact topological space and F is a sheaf of MV‐algebras with stalks that are local (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

On Vaught’s Conjecture and finitely valued MV algebras

We show that the complete first order theory of an MV algebra has $2^{\aleph _0}$ countable models unless the MV algebra is finitely valued. So, Vaught's Conjecture holds for all MV algebras except, possibly, for finitely valued ones. Additionally, we show that the complete theories of finitely valued MV algebras are $2^{\aleph _0}$ and that all ω‐categorical complete theories of MV algebras are finitely axiomatizable and decidable. As a final result we prove that the free algebra on countably many generators of any locally finite variety of MV algebras is ω‐categorical.     

Affine PBW bases and MV polytopes in rank 2

Mirkovi?–Vilonen (MV) polytopes have proven to be a useful tool in understanding and unifying many constructions of crystals for finite-type Kac-Moody algebras. These polytopes arise naturally in many places, including the affine Grassmannian, pre-projective algebras, PBW bases, and KLR algebras. There has recently been progress in extending this theory to the affine Kac-Moody algebras. A definition of MV polytopes in symmetric affine cases has been proposed using pre-projective algebras. In the rank-2 affine cases, a combinatorial definition has also been proposed. Additionally, the theory of PBW bases has been extended to affine cases, and, at least in rank-2, we show that this can also be used to define MV polytopes. The main result of this paper is that these three notions of MV polytope all agree in the relevant rank-2 cases. Our main tool is a new characterization of rank-2 affine MV polytopes.     

On the category of hyper MV‐algebras

In this paper we study the category of hyper MV‐algebras and we prove that it has a terminal object and a coequalizer. We show that Jia's construction can be modified to provide a free hyper MV‐algebra by a set. We use this to show that in the category of hyper MV‐algebras the monomorphisms are exactly the one‐to‐one homomorphisms. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Fuzzy蕴涵代数与MV代数

本文讨论Ｆｕｚｚｙ蕴涵代数与ＭＶ代数之间的关系，并证明了在一定的条件下Ｆｕｚｚｙ蕴函代数是剩余格。     

蕴涵代数与BCK代数

系统研究 Fuzzy蕴涵代数与 BCK代数之间的关系 ,给出 MV代数与 BCK代数之间的联系 ,建立正则 FI代数和对合 BCK代数的对偶代数     

R_0代数的滤子理论

在R0代数中引入了正蕴涵滤子、奇异滤子、MV滤子的概念,讨论了这些滤子的性质及关系.得到了:在R0代数上,蕴涵滤子、正蕴涵滤子、布尔滤子是等价的;奇异滤子与MV滤子是等价的;正蕴涵滤子是奇异滤子,但反之不真.     

格蕴涵代数与MV-代数

§１．　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｏｒｄｅｒｔｏｒｅｓｅａｒｃｈｔｈｅｌｏｇｉｃａｌｓｙｓｔｅｍｗｈｏｓｅｐｒｏｐｏｓｉｔｉｏｎａｌｖａｌｕｅｉｓｇｉｖｅｎｉｎａｌａｔｔｉｃｅｆｒｏｍｔｈｅｓｅｍａｎｔｉｃｖｉｅｗｐｏｉｎｔ，ｗｅｈａｖｅｐｒｏｐｏｓｅｄｔｈｅｃｏｎｃｅｐｔｏｆｌａｔｔｉｃｅｉｍｐｌｉｃａｔｉｏｎａｌｇｅｂｒａｓｉｎ［１］ａｎｄｈａｖｅｄｉｓｃｕｓｓｅｄｔｈｅｉｒｓｏｍｅｐｒｏｐｅｒｔｉｅｓ．ＭＶ－ａｌｇｅｂｒａｓｗｅｒｅｉｎｖｅｎｔｅｄｂｙＣ．Ｃ．Ｃｈａｎｇ［２］ｉｎｏｒｄｅ…     

关于格上蕴涵代数及其对偶代数

给出了格蕴涵代数、MV代数、R₀代数等一些格上蕴涵代数之间的关系,并建立了它们的对偶代数.其结果描述了这些代数内部结构的特征,同时也为从语义的角度进一步研究格值逻辑系统提供了一个新的途径.     

Hyper‐Archimedean BL‐algebras are MV‐algebras

Generalizations of Boolean elements of a BL‐algebra L are studied. By utilizing the MV‐center MV(L) of L, it is reproved that an element x ∈ L is Boolean iff x ∨ x * = 1 . L is called semi‐Boolean if for all x ∈ L, x * is Boolean. An MV‐algebra L is semi‐Boolean iff L is a Boolean algebra. A BL‐algebra L is semi‐Boolean iff L is an SBL‐algebra. A BL‐algebra L is called hyper‐Archimedean if for all x ∈ L, xⁿ is Boolean for some finite n ≥ 1. It is proved that hyper‐Archimedean BL‐algebras are MV‐algebras. The study has application in mathematical fuzzy logics whose Lindenbaum algebras are MV‐algebras or BL‐algebras. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)