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Group service system with three queues and load balancing 三队列、负载均衡的群服务系统
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-08-01 DOI: 10.1515/dma-2022-0019
M. P. Savelov
Abstract A group service system for three queues is considered. At each time t = 1, 2, . . ., with some probability, a customer enters the system, selects randomly two queues, and goes to the shorter one. At each moment such that there is at least one customer in each queue, each queue performs instantly the service of one customer. By means of Lyapunov functions, a criterion for the ergodicity of the Markov chain corresponding to this queuing system is established. The limiting joint distribution of queue lengths is found, and the connection with the problem of balanced allocations of particles into cells is described. In the corresponding problem of balanced allocation of particles, the limiting distribution of the range is found, i. e. the difference between the maximal and minimal numbers of particles in cells.
摘要考虑了一个具有三个队列的群服务系统。在每个时间t=1、2、…、。,在一定概率下,客户进入系统,随机选择两个队列,然后转到较短的队列。在每个队列中至少有一个客户的时刻,每个队列都会立即执行一位客户的服务。利用李雅普诺夫函数,建立了与该排队系统对应的马尔可夫链遍历性的判据。发现了队列长度的极限联合分布,并描述了与粒子均衡分配到单元中的问题的联系。在相应的粒子平衡分配问题中,发现了范围的极限分布,即细胞中粒子的最大数量和最小数量之间的差异。
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引用次数: 0
Invertible matrices over some quotient rings: identification, generation, and analysis 一些商环上的可逆矩阵:识别、生成和分析
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-08-01 DOI: 10.1515/dma-2022-0022
V. Vysotskaya, L. Vysotsky
Abstract We study matrices over quotient rings modulo univariate polynomials over a two-element field. Lower bounds for the fraction of the invertible matrices among all such matrices of a given size are obtained. An efficient algorithm for calculating the determinant of matrices over these quotient rings and an algorithm for generating random invertible matrices (with uniform distribution on the set of all invertible matrices) are proposed and analyzed. An effective version of the latter algorithm for quotient rings modulo polynomials of form xr − 1 is considered and analyzed. These methods may find practical applications for generating keys of cryptographic schemes based on quasi-cyclic codes such as LEDAcrypt.
摘要研究了二元域上商环上的矩阵模一元多项式。得到了给定大小的所有可逆矩阵的分数的下界。提出并分析了一种计算这些商环上矩阵行列式的有效算法和生成随机可逆矩阵(在所有可逆矩阵的集合上均匀分布)的算法。考虑并分析了后一种算法对形式为xr−1的商环模多项式的有效版本。这些方法可以在基于准循环码(如LEDAcrypt)的密码方案的密钥生成中找到实际应用。
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引用次数: 3
On a generalization of class of negative binomial distributions 一类负二项分布的推广
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-08-01 DOI: 10.1515/dma-2022-0021
Alexander N. Timashev
Abstract A class of one-dimensional discrete power series distributions containing negative binomial distributions is considered. Properties of distributions of this class are investigated. Limit theorems generalizing similar theorems for the negative binomial distributions are proved. The proofs are based both on elementary asymptotic methods and on a modification of saddle-point method.
研究了一类含有负二项分布的一维离散幂级数分布。研究了这类分布的性质。证明了负二项分布的极限定理,推广了类似定理。这些证明既基于初等渐近方法,也基于鞍点法的一种改进。
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引用次数: 0
On synthesis of reversible circuits consisting of NOT, CNOT, 2-CNOT gates with small number of additional inputs 由非、CNOT、2-CNOT栅极和少量附加输入组成的可逆电路的合成
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-08-01 DOI: 10.1515/dma-2022-0023
D. Zakablukov
Abstract Reversible circuits consisting of NOT, CNOT and 2-CNOT gates with small number of additional inputs are considered. For such a circuit implementing a map f:Z2n→Z2n, $fcolon mathbb Z_2^n to mathbb Z_2^n,$we study the Shannon complexity function L(n, q) under the condition that the number of additional inputs is q = O(n2). For this range of q, it is shown that L(n,q)≍n2n/log2n. $L(n,q) asymp n2^n mathop / log_2 n.$We show that L(n,q)≍n2n/log2(n+q) $L(n,q) asymp n2^n mathop / log_2 (n+q)$for all q≲n2n−⌈n/ϕ(n)⌉, $q lesssim n2^{n-lceil n mathop / phi(n)rceil},$where ϕ(n)→∞andn/ϕ(n)−log2n→∞asn→∞. $phi(n) to infty {text {and}} ,n mathop / phi(n) - log_2 n to infty ,{text {as}}, n to infty.$
摘要考虑了由NOT、CNOT和2-CNOT门组成的具有少量附加输入的可逆电路。对于这样一个实现映射f:Z2n的电路→Z2n,$fcolonmathbb Z_2^ntomathbb Z_2^n,$我们研究了在附加输入数为q=O(n2)的条件下的Shannon复杂度函数L(n,q)。对于这个范围的q,证明了L(n,q)≍n2n/log2n$L(n,q→∞和n/ξ(n)−log2n→∞asn→∞. $phi(n)toinfty{text{and}},nmathop/phi(n)-log_2 ntoinfty ,{ttext{as}},nto infty$
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引用次数: 0
Diagnostic tests for discrete functions defined on rings 定义在环上的离散函数的诊断检验
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-06-01 DOI: 10.1515/dma-2022-0014
G. V. Antyufeev
Abstract The paper is concerned with sources of faults associated with commutative principal ideal rings. Tables of faults of such sources are known to correspond to Cayley multiplication tables in rings, whose elements are replaced by the values of a Boolean function of these elements. For such rings, the concepts of a diagnostic test and the Shannon function for the length of a diagnostic test are introduced in a natural way. It is shown that if A is a principal ideal ring with only one prime ideal p ≠ A, and if pn = 0 for some n ∈ ℕ, then, for this ring, the Shannon length function of a diagnostic test has the form Ldiagn(A, n) = Θ(n). We also define an easily testable functions, i.e., a function with respect to which the order of growth of the length of a diagnostic test with respect to this function is equal to the logarithm of the number of pairwise distinct columns of the table of faults. A link between easily testable functions and column separation of tables of faults for two concrete sources of faults is established.
摘要研究了交换主理想环的故障来源。已知这些源的故障表对应于环形的凯利乘法表,其元素被这些元素的布尔函数的值所取代。对于这样的环,以一种自然的方式引入了诊断测试的概念和诊断测试长度的Shannon函数。证明了如果A是一个只有一个素理想p≠A的主理想环,且对于某n∈n, pn = 0,则对于该环,诊断检验的香农长度函数具有Ldiagn(A, n) = Θ(n)的形式。我们还定义了一个易于测试的函数,即一个函数,对于这个函数,诊断测试的长度的增长顺序等于故障表中成对不同列数的对数。针对两个具体的故障源,建立了易测试函数与故障表列分离之间的联系。
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引用次数: 0
Frontmatter Frontmatter
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-06-01 DOI: 10.1515/dma-2022-frontmatter3
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引用次数: 0
New lower bound for the minimal number of edges of simple uniform hypergraph without the property Bk 不具有Bk性质的简单一致超图最小边数的新下界
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-06-01 DOI: 10.1515/dma-2022-0015
Y. Demidovich
Abstract A hypergraph H = (V, E) has the property Bk if there exists an assignment of two colors to V such that each edge contains at least k vertices of each color. A hypergraph is called simple if every two edges of it have at most one common vertex. We obtain a new lower bound for the minimal number of edges of n-uniform simple hypergraph without the property Bk.
超图H=(V,E)具有Bk性质,如果存在两种颜色对V的赋值,使得每条边至少包含每种颜色的k个顶点。如果超图的每两条边最多有一个公共顶点,则超图称为简单超图。我们得到了不具有Bk性质的n-一致简单超图的最小边数的一个新的下界。
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引用次数: 0
On some limit properties for the power series distribution 幂级数分布的一些极限性质
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-06-01 DOI: 10.1515/dma-2022-0017
Yu Miao, Yanyan Tang, Xiaoming Qu, Guangyu Yang
Abstract In the present paper, we consider random variables with the power series distribution which is often used in the study of the generalized allocation scheme. We establish some asymptotic properties which include law of large numbers, moderate deviation principle, almost sure central limit theorem and the rate of convergence in the local limit theorem. These results supplements results obtained by A. V. Kolchin.
摘要本文考虑了广义分配方案研究中经常用到的幂级数分布的随机变量。我们建立了一些渐近性质,包括大数定律、中等偏差原理、几乎确定的中心极限定理和局部极限定理中的收敛速度。这些结果补充了a.v. Kolchin的结果。
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引用次数: 0
On bases of all closed classes of Boolean vector functions 关于布尔向量函数的所有闭类的基
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-06-01 DOI: 10.1515/dma-2023-0017
V. A. Taimanov
Abstract The functional system of Boolean vector functions with the naturally defined superposition operation is considered. It is shown that every closed class of this system admits a finite basis.
摘要考虑了具有自然定义的叠加运算的布尔向量函数的函数系统。证明了该系统的每一个闭类都有一个有限基。
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引用次数: 0
On some invariants under the action of an extension of GA(n, 2) on the set of Boolean functions 关于GA(n,2)在布尔函数集上的扩展作用下的一些不变量
IF 0.5 Q4 MATHEMATICS, APPLIED Pub Date : 2022-06-01 DOI: 10.1515/dma-2022-0016
O. A. Logachev, Sergey N. Fedorov, V. V. Yashchenko
Abstract Let G be the extension of a general affine group by the group of affine functions. We study the action of G on the set of Boolean functions. The action consists in nondegenerate affine transformations of variables and addition of affine Boolean functions. We introduce and examine some parameters of Boolean functions which are invariant with respect to the action of G. These are the amplitude (which is closely related to the nonlinearity), the dimension of a function, and some others. The invariants, together with some additionally proposed notions, could be used to obtain new bounds on cryptographic parameters of Boolean functions, including the maximum nonlinearity of functions in an odd number of variables.
摘要设G为一般仿射群被仿射函数群扩展。研究了G在布尔函数集上的作用。作用包括变量的非简并仿射变换和仿射布尔函数的加法。我们介绍并检验了布尔函数的一些参数,这些参数对g的作用是不变的,这些参数是振幅(与非线性密切相关),函数的维数,以及其他一些参数。利用这些不变量和一些附加的概念,可以得到布尔函数的密码参数的新界,包括函数在奇数变量下的最大非线性。
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引用次数: 0
期刊
Discrete Mathematics and Applications
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