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(&omega,c)- PSEUDO ALMOST PERIODIC FUNCTIONS, (&omega,c)- PSEUDO ALMOST AUTOMORPHIC FUNCTIONS AND APPLICATIONS (&,c)-伪概周期函数,(&,c)-伪概自同构函数及其应用
IF 0.4 Pub Date : 2021-05-24 DOI: 10.22190/FUMI200421014K
M. T. Khalladi, M. Kostic, A. Rahmani, D. Velinov
In this paper, we introduce the classes of $(omega, c)$-pseudo almost periodicfunctions and $(omega, c)$-pseudo almost automorphicfunctions. These collections include $(omega, c)$-pseudo periodicfunctions, pseudo almost periodic functions and their automorphic analogues.We present an application to the abstract semilinear first-order Cauchy inclusions in Banach spaces.
本文介绍了$(,c)$-伪概周期函数和$(,c)$-伪概自同构函数。这些集合包括$(omega, c)$-伪周期函数、伪几乎周期函数及其自同构类似函数。给出了Banach空间中抽象半线性一阶柯西包含的一个应用。
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引用次数: 1
ON ROUGH $I^*$ AND $I^K$-CONVERGENCE OF SEQUENCES IN NORMED LINEAR SPACES 赋范线性空间中序列$ i ^*$和$ i ^ k $的粗糙收敛性
IF 0.4 Pub Date : 2021-02-13 DOI: 10.22190/fumi210921038b
A. Banerjee, Anirban Paul
In this paper, we have introduced first the notion of rough $I^*$-convergence in a normed linear space as an extension work of rough $I$-convergence and then rough $I^K$-convergence in more general way. Then we have studied some properties on these two newly introduced ideas. We also examined the relationship between rough $I$-convergence with both of rough $I^*$-convergence and rough $I^K$-convergence.
本文首先引入了赋范线性空间中I^*$-粗糙收敛的概念,作为I$-粗糙收敛的推广工作,然后以更一般的方式引入了I^K$-粗糙收敛的概念。然后我们研究了这两个新引入的思想的一些性质。我们还研究了粗糙$I$收敛与粗糙$I^*$收敛和粗糙$I^K$收敛之间的关系。
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引用次数: 1
NONLINEAR NEUTRAL CAPUTO-FRACTIONAL DIFFERENCE EQUATIONS WITH APPLICATIONS TO LOTKA-VOLTERRA NEUTRAL MODEL 非线性中立型卡普分数差分方程及其在lotka-volterra中立型模型中的应用
IF 0.4 Pub Date : 2021-02-10 DOI: 10.22190/FUMI2005475M
M. Mesmouli, A. Ardjouni, A. Djoudi
In this paper, we consider a nonlinear neutral fractional difference equations. By applying Krasnoselskii's fixed point theorem, sufficient conditions for the existence of solutions are established, also the uniqueness of solutions is given. As an application of the main theorems, we provide the existence and uniqueness of the discrete fractional Lotka-Volterra model of neutral type. Our main results extend and generalize the results that are obtained in Azabut.
本文考虑一类非线性中立型分数阶差分方程。应用Krasnoselskii不动点定理,建立了解存在的充分条件,并给出了解的唯一性。作为主要定理的应用,我们给出了中立型离散分数型Lotka-Volterra模型的存在唯一性。我们的主要结果推广和推广了在Azabut得到的结果。
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引用次数: 1
COMPARATIVE STUDY OF MUTATION OPERATORS IN THE GENETIC ALGORITHMS FOR THE K-MEANS PROBLEM k -均值问题遗传算法中变异算子的比较研究
IF 0.4 Pub Date : 2021-02-02 DOI: 10.22190/FUMI2004091L
Ri-Zhi Li, L. Kazakovtsev
The k-means problem and the algorithm of the same name are the most commonly used clustering model and algorithm. Being a local search optimization method, the k-means algorithm falls to a local minimum of the objective function (sum of squared errors) and depends on the initial solution which is given or selected randomly. This disadvantage of the algorithm can be avoided by combining this algorithm with more sophisticated methods such as the Variable Neighborhood Search, agglomerative or dissociative heuristic approaches, the genetic algorithms, etc. Aiming at the shortcomings of the k-means algorithm and combining the advantages of the k-means algorithm and rvolutionary approack, a genetic clustering algorithm with the cross-mutation operator was designed. The efficiency of the genetic algorithms with the tournament selection, one-point crossover and various mutation operators (without any mutation operator, with the uniform mutation, DBM mutation and new cross-mutation) are compared on the data sets up to 2 millions of data vectors. We used data from the UCI repository and special data set collected during the testing of the highly reliable semiconductor components. In this paper, we do not discuss the comparative efficiency of the genetic algorithms for the k-means problem in comparison with the other (non-genetic) algorithms as well as the comparative adequacy of the k-means clustering model. Here, we focus on the influence of various mutation operators on the efficiency of the genetic algorithms only.
k-means问题和同名算法是最常用的聚类模型和算法。k-means算法是一种局部搜索优化方法,它落在目标函数(误差平方和)的局部最小值上,依赖于随机给定或选择的初始解。通过将该算法与更复杂的方法(如可变邻域搜索、聚集或解离启发式方法、遗传算法等)相结合,可以避免该算法的这一缺点。针对k-means算法的不足,结合k-means算法和进化算法的优点,设计了一种带有交叉变异算子的遗传聚类算法。在多达200万个数据向量的数据集上,比较了竞赛选择、一点交叉和各种变异算子(无变异算子、均匀变异、DBM变异和新交叉变异)的遗传算法的效率。我们使用了来自UCI存储库的数据和在高可靠性半导体组件测试期间收集的特殊数据集。在本文中,我们没有讨论k-means问题的遗传算法与其他(非遗传)算法的比较效率,也没有讨论k-means聚类模型的比较充分性。这里,我们只关注各种变异算子对遗传算法效率的影响。
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引用次数: 0
TAUBERIAN THEOREMS FOR THE WEIGHTED MEAN METHOD OF SUMMABILITY OF INTEGRALS 积分可和性的加权平均法的Tauberian定理
IF 0.4 Pub Date : 2020-11-01 DOI: 10.1063/1.5136127
Ibrahim Çanak, Firat Ozsarac
Let $q$ be a positive weight function on $mathbf{R}_{+}:=[0, infty)$ which is integrable in Lebesgue's sense over every finite interval $(0,x)$ for $00$, $Q(0)=0$ and $Q(x) rightarrow infty $ as $x to infty $.Given a real or complex-valued function $f in L^{1}_{loc} (mathbf{R}_{+})$, we define $s(x):=int_{0}^{x}f(t)dt$ and$$tau^{(0)}_q(x):=s(x), tau^{(m)}_q(x):=frac{1}{Q(x)}int_0^x tau^{(m-1)}_q(t) q(t)dt,,, (x>0, m=1,2,...),$$provided that $Q(x)>0$. We say that $int_{0}^{infty}f(x)dx$ is summable to $L$ by the $m$-th iteration of weighted mean method determined by the function $q(x)$, or for short, $(overline{N},q,m)$ integrable to a finite number $L$ if$$lim_{xto infty}tau^{(m)}_q(x)=L.$$In this case, we write $s(x)rightarrow L(overline{N},q,m)$. It is known thatif the limit $lim _{x to infty} s(x)=L$ exists, then $lim _{x to infty} tau^{(m)}_q(x)=L$ also exists. However, the converse of this implicationis not always true. Some suitable conditions together with the existence of the limit $lim _{x to infty} tau^{(m)}_q(x)$, which is so called Tauberian conditions, may imply convergence of $lim _{x to infty} s(x)$. In this paper, one- and two-sided Tauberian conditions in terms of the generating function and its generalizations for $(overline{N},q,m)$ summable integrals of real- or complex-valued functions have been obtained. Some classical type Tauberian theorems given for Ces`{a}ro summability $(C,1)$ and weighted mean method of summability $(overline{N},q)$ have been extended and generalized.  
设$q$是$mathbf{R}_{+}:=[0, infty)$上的一个正权函数,在Lebesgue意义上在每一个有限区间上可积$(0,x)$对于$00$, $Q(0)=0$和$Q(x) rightarrow infty $为$x to infty $。给定一个实数或复值函数$f in L^{1}_{loc} (mathbf{R}_{+})$,我们定义$s(x):=int_{0}^{x}f(t)dt$和$$tau^{(0)}_q(x):=s(x), tau^{(m)}_q(x):=frac{1}{Q(x)}int_0^x tau^{(m-1)}_q(t) q(t)dt,,, (x>0, m=1,2,...),$$,假设$Q(x)>0$。我们说$int_{0}^{infty}f(x)dx$可以通过由函数$q(x)$确定的$m$ -次迭代加权平均方法求和到$L$,或者简而言之,$(overline{N},q,m)$可积到一个有限数$L$如果$$lim_{xto infty}tau^{(m)}_q(x)=L.$$在这种情况下,我们写$s(x)rightarrow L(overline{N},q,m)$。已知,如果极限$lim _{x to infty} s(x)=L$存在,则$lim _{x to infty} tau^{(m)}_q(x)=L$也存在。然而,这一含义的反面并不总是正确的。一些适当的条件,加上极限$lim _{x to infty} tau^{(m)}_q(x)$的存在,即所谓的Tauberian条件,可以暗示$lim _{x to infty} s(x)$的收敛性。本文给出了$(overline{N},q,m)$实值或复值函数可和积分的生成函数的单侧和双侧Tauberian条件及其推广。推广和推广了关于Cesàro可和性$(C,1)$和可和性的加权平均法$(overline{N},q)$的经典型陶培尔定理。
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引用次数: 0
ON STAR COLORING OF DEGREE SPLITTING OF COMB PRODUCT GRAPHS 梳状积图度分裂的星形着色
IF 0.4 Pub Date : 2020-05-28 DOI: 10.22190/FUMI2002507S
Ulagammal Subramanian, V. Joseph
A star coloring of a graph G is a proper vertex coloring in which every path on four vertices in G is not bicolored. The star chromatic number χs (G) of G is the least number of colors needed to star color G. Let G = (V,E) be a graph with V = S1 [ S2 [ S3 [ . . . [ St [ T where each Si is a set of all vertices of the same degree with at least two elements and T =V (G) − St i=1 Si. The degree splitting graph DS (G) is obtained by adding vertices w1,w2, . . .wt and joining wi to each vertex of Si for 1 i t. The comb product between two graphs G and H, denoted by G ⊲ H, is a graph obtained by taking one copy of G and |V (G)| copies of H and grafting the ith copy of H at the vertex o to the ith vertex of G. In this paper, we give the exact value of star chromatic number of degree splitting of comb product of complete graph with complete graph, complete graph with path, complete graph with cycle, complete graph with star graph, cycle with complete graph, path with complete graph and cycle with path graph.
图G的星形着色是一种适当的顶点着色,其中G中四个顶点上的每条路径都不是双色的。G的星形色数χs (G)是星形色G所需的最少颜色数。设G = (V,E)为一个图,其中V = S1 [S2] S3[…]。[St] T,其中每个Si是至少有两个元素的相同度的所有顶点的集合,T =V (G)−St i= 1si。分裂程度图DS (G)是通过添加顶点w1、w2, .wt和加入wi Si的每个顶点1我t。梳两个图G和H之间的产品,用G⊲H,得到的是一个图G的一个副本和V (G) | | H和嫁接的第i个副本的副本在第i个顶点的顶点o H G在这篇文章中,我们给星色数的精确值的分裂程度梳理产品完全图的完全图,完全图的路径,完全图带循环,完全图带星图,循环带完全图,路径带完全图,循环带路径图。
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引用次数: 0
FIXED POINT THEOREMS FOR SUBSEQUENTIALLY MULTI-VALUED F_delta -CONTRACTIONS IN METRIC SPACES 度量空间中次多值F_ -缩缩的不动点定理
IF 0.4 Pub Date : 2020-05-28 DOI: 10.22190/FUMI2002379B
S. Beloul, Heddi Kaddouri
The aim of this paper is to prove common fixed point theorems for multivalued contraction of Wordowski type, by using the concept of subsequential continuity in the setting of set valued context contractions with compatibility. We have also given an example and an application to integral inclusions of Fredholm type to support our results.
摘要在具有相容性的集值上下文压缩集合中,利用序贯连续性的概念,证明了Wordowski型多值压缩的公共不动点定理。我们还给出了Fredholm类型的积分包含的一个例子和应用来支持我们的结果。
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引用次数: 1
THE D_p^q (∆^+r )-STATISTICAL CONVERGENCE D_p^q(∆^+r)-统计收敛
IF 0.4 Pub Date : 2020-05-28 DOI: 10.22190/FUMI2002405B
Neslihan Boztaş, M. Küçükaslan
Let p(n) and q(n) be nondecreasing sequence of positive integers such that p(n) < q(n) and limn→∞ q(n) = ∞ holds. For any r ∈ Z^+, we define D_p,q^+r- statistical convergence of ∆^+r x where ∆^+r is r- th difference of the sequence (x_n). The main results in this paper consist in determining sets of sequences χ and χ' of the form [D_ p^q]_0 α satisfying χ ⊂ [D_p^q]_0(∆^+r ) ⊂ χ ' and sets φ and φ' of the form [D_p^q]_α satisfying φ ≤ [D_p^q]_∞(∆^+r ) ≤ φ'  .
设p(n)和q(n)是正整数的非递减序列,使得p(n) < q(n)且limn→∞q(n) =∞成立。对于任意r∈Z^+,我们定义D_p,q^+r-∆^+r x的统计收敛性,其中∆^+r为r-序列(x_n)的差。本文的主要结果在于确定了形式为[D_p^q]_0 α的序列χ和χ'的集合满足χ∧[D_p^q]_0(∆^+r)∧χ',以及形式为[D_p^q]_α的集合φ和φ'满足φ≤[D_p^q]_∞(∆^+r)≤φ'。
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引用次数: 0
ON THE SIGNED MATCHINGS OF GRAPHS 关于图的带符号匹配
IF 0.4 Pub Date : 2020-05-28 DOI: 10.22190/FUMI2002541J
S. Javan, H. Maimani
For a graph $G$ and any $vin V(G)$, $E_{G}(v)$ is the set of all edges incident with $v$. A function $f:E(G)rightarrow {-1,1}$ is called a signed matching  of $G$ if  $sum_{ein E(v)}f(e) leq 1$ for every $ {vin V(G)}$. For a signed matching $x$, set $x(E(G))=sum_{ein E(G))}x(e)$. The signed  matching number of $G$, denoted by $beta_1'(G)$, is the maximum $x(E(G))$ where the maximum is taken over all signed matching over $G$. In this paper we obtain the signed matching number of some families of graphs and study the signed matching number of subdivision and edge deletion of edges of graph.
对于图$G$和任意$vin V(G)$, $E_{G}(v)$是与$v$相关的所有边的集合。对于每个$ {vin V(G)}$,函数$f:E(G)rightarrow {-1,1}$被称为$G$如果$sum_{ein E(v)}f(e) leq 1$的签名匹配。对于签名匹配$x$,请设置$x(E(G))=sum_{ein E(G))}x(e)$。$G$的签名匹配数,用$beta_1'(G)$表示,是最大的$x(E(G))$,其中最大值取$G$上的所有签名匹配。本文给出了若干图族的签名匹配数,并研究了图的边的细分和边的删除的签名匹配数。
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引用次数: 0
SOME CLASSES OF CONVEX FUNCTIONS ON TIME SCALES 时间尺度上的几类凸函数
IF 0.4 Pub Date : 2020-04-06 DOI: 10.22190/FUMI2001011B
Fagbemigun Opeyemi Bosede, Adesanmi Alao Mogbademu
We have introduced diamond $phi_{h-s, mathbb{T}}$ derivative and diamond $phi_{h-s,mathbb{T}}$ integral on an arbitrary time scale. Moreover, various interconnections with the notion of classes of convex functions about these new concepts are also discussed.
我们引入了任意时间尺度上的diamond $phi_{h-s,mathbb{T}}$导数和diamond $phi_{h-s,mathbb{T}}$积分。此外,还讨论了这些新概念与凸函数类概念之间的各种联系。
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引用次数: 7
期刊
Facta Universitatis-Series Mathematics and Informatics
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