模糊有限状态机的商与同态北大核心

文章利用模糊有限状态机的容许划分讨论了模糊有限状态机的商与同态问题,得到了在强满同态或强同构意义下模糊有限状态机之间的关系,以及它们的商模糊有限状态机的相互关系,获得了模糊有限状态机的同态分解定理,给出了可识别集的一些性质。     

模糊有限状态机的商与同态

文章利用模糊有限状态机的容许划分讨论了模糊有限状态机的商与同态问题,得到了在强满同态或强同构意义下模糊有限状态机之间的关系,以及它们的商模糊有限状态机的相互关系,获得了模糊有限状态机的同态分解定理,给出了可识别集的一些性质。     

双极模糊有限状态机的代数刻画

利用双极模糊集的定义,提出了完全的,循环的,强连通的,可恢复的双极模糊有限状态机,双极模糊有限状态机的子机的概念。讨论了双极模糊有限状态机在同态作用下的一些性质,刻画了强连通的与可恢复的双极模糊有限状态机的性质。     

广义模糊子半环的广义模糊双(内)理想

给出了广义模糊子半环的广义模糊双(内)理想的概念.运用截集、模糊子集的和与积得到了广义模糊子半环的广义模糊双(内)理想的等价条件及性质,同时还得到了在半环的同态映射下同态像及同态原像的性质.当λ=0,μ=1时,得到一般意义下的模糊子半环的模糊双(内)理想的相应结果.     

模糊有限状态机的一些性质

讨论模糊有限状态机的一些代数性质,得到模糊有限状态机在同态作用下子系统(强子系统)的前像仍是子系统(强子系统),证明若两个模糊有限状态机之间存在满足一定条件的同态映射时,前一个模糊有限状态机是强连通的(循环的),则后一个模糊有限状态机也是强连通的(循环的),且若这个同态是强满同态,则其中一个模糊有限状态机是完全的当且仅当另一个模糊有限状态机是完全的。对模糊有限状态机的积与原来的模糊有限状态机的完全性、强连通性、循环性、交换性等关系也进行讨论,得到一些结果。     

格值模糊有限自动机的同态

引入了格值模糊有限自动机的(强)同态的概念,研究了它们的相关性质,得出了同态基本定理。给出了A上容许关系及强同态的核的概念,研究了它们相关性质。     

h-准正则半环的广义直觉模糊理想刻画

介绍了h-准正则半环的概念,对其主要性质进行了探讨,并利用半环上有边界值的直觉模糊h-理想和直觉模糊双理想,得到了h-准正则半环的若干刻画定理.     

超半环的广义直觉模糊理想刻画

对超半环上的直觉模糊子集进行讨论.首先在超半环上给出有边界值的直觉模糊超理想,对其部分性质进行研究.其次给出正则超半环和内禀正则超半环的概念,利用有边界值的直觉模糊超理想对这两种超半环进行刻画,得到若干刻画定理.     

循环模糊有限状态机的半群和同态

定义了循环模糊有限状态机M=(Q,X,μ)输入字集X*上的右同余关系,讨论了其等价类做成的半群E(M)的性质,及以该半群的子集为状态集的循环模糊有限状态机(M)与原循环模糊有限状态机M的同态关系,得出了在某些条件下,(M)与M是强同构的.     

Ω-模糊可补子半环

给定一个集合Ω,引入了可补半环的Ω-模糊可补子半环的概念,研究了它的一些基本性质。给出了可补半环的Ω-模糊可补子半环的等价刻画,证明了可补半环的Ω-模糊可补子半环的交、同态像与同态原像等也是可补半环的Ω-模糊可补子半环。最后,通过在SΩ上定义运算+,×,-,得到可补半环(SΩ,+,×,-),并研究了与其相关的模糊可补子半环与Ω-模糊可补子半环。     

幺半环上几类模糊自动机的关系

给出了幺半环上非确定的模糊自动机和确定的模糊自动机及其语言的定义,证明了幺半环上三类非确定的模糊自动机间的等价性和三类确定的模糊自动机间的等价性,讨论了幺半环上三类非确定的模糊自动机和第四类非确定的模糊自动机之间的关系,以及幺半环上非确定的模糊自动机和确定的模糊自动机之间的关系.     

Intuitionistic fuzzy finite state machines

Using the notion of intuitionistic fuzzy sets, the concepts of intuitionistic fuzzy finite state machines (iffsm), intuitionistic successor s, intuitionistic subsystems, intuitionistic submachines, intuitionisticq-twins, and intuitionistic retrievable iffsm are introduce d, and related properties are studied. Relations between intuitionisticq-twins and intuitionisticq-related iffsm are given. A characterization of an intuitionistic retrievable iffsm is provided.     

FP-injective semirings,semigroup rings and Leavitt path algebras

In this paper we give characterisations of FP-injective semirings (previously termed “exact” semirings in work of the first author). We provide a basic connection between FP-injective semirings and P-injective semirings, and establish that FP-injectivity of semirings is a Morita invariant property. We show that the analogue of the Faith-Menal conjecture (relating FP-injectivity and self-injectivity for rings satisfying certain chain conditions) does not hold for semirings. We prove that the semigroup ring of a locally finite inverse monoid over an FP-injective ring is FP-injective and give a criterion for the Leavitt path algebra of a finite graph to be FP-injective.     

双极值模糊集在半环上的应用

On the basis of concepts of bipolar fuzzy sets, we establish a new framework of bipolar fuzzy subsemirings（resp., ideals） which is a generalization of traditional fuzzy subsemirings（resp., ideals） in semirings. The concepts of bipolar fuzzy subsemirings（resp., ideals） are introduced and related properties are investigated by means of positive t-cut, negative s-cut and equivalence relation. Particularly, the notion of a normal bipolar fuzzy ideal is given, and some basic properties are studied in this paper.     

On the coincidence of the factor and Gondran–Minoux rank functions of matrices over a semiring

We consider the rank functions of matrices over semirings, functions that generalize the classical notion of the rank of a matrix over a field. We study semirings over which the factor and Gondran–Minoux ranks of any matrix coincide. It is shown that every semiring satisfying that condition is a subsemiring of a field. We provide an example of an integral domain over which the factor and Gondran–Minoux ranks are different.     

Role of operator semirings in characterizing Γ-semirings in terms of fuzzy subsets

The operator semirings of a ??-semiring have been brought into use to study ??-semiring in terms of fuzzy subsets. This is accomplished by obtaining various relationships between the set of all fuzzy ideals of a ??-semiring and the set of all fuzzy ideals of its left operator semiring such as lattice isomorphism between the sets of fuzzy ideals of a ??-semiring and its operator semirings.     

Perfect state transfer in unitary Cayley graphs and gcd-graphs

In this work, we consider the problem on the existence of perfect state transfer in unitary Cayley graphs and gcd-graphs over finite commutative rings. We characterize all finite commutative rings allowing perfect transfer to occur on their unitary Cayley graphs. Also, we use our main result to study perfect state transfer in unitary Cayley signed graphs and some gcd-graphs on quotient rings of unique factorization domains. Moreover, we can apply some calculations on the eigenvalues to determine the existence of perfect state transfer in Cayley graphs over finite chain rings.     

模糊关系下的半环的广义模糊双理想

给出了半环的广义模糊双理想的概念并讨论了模糊关系下的半环的广义模糊双理想的一些代数性质.     

半环的L-模糊理想的范畴性质

首先给出了半环的L-模糊理想同态的定义,在此基础上较系统地讨论了半环的L-模糊理想范畴的性质,证明了此范畴是半环范畴上的一个拓扑结构,并探讨了其中的等子、拉回和乘积等性质.另一方面,给出了半环的L-模糊理想范畴的逆系统的定义,建立了半环的L-模糊理想范畴中逆系统的逆极限结构.特别是在引入两个逆系统之间映射的基础上,得到了两个逆系统的逆极限之间的极限映射.