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1.
In a previous paper the authors, together with Balwant Singh, introduced an elementwisc char­acterization of weak subintegrality for an extension A?B of commutative rings. In the present paper we improve our methods for working with this characterization. This leads us to propose two new types of “elementary weakly subintegral extension”.  相似文献   

2.
This note shows that solving fully fuzzy linear programming (FFLP) model presented by Kumar et al. [A. Kumar, J. Kaur, P. Singh, A new method for solving fully fuzzy linear programming problems, Appl. Math. Model. 35 (2011) 817–823] needs some corrections to make the model well in general. A new version is provided in this note. A simple example is also presented to demonstrate the new form.  相似文献   

3.
We introduce a new kind of double sequences named MVBVDS and some new classes of weight functions to study the weighted integrability of the double trigonometric series. Several results of Chen, Marzuq, Móricz, Ram and Singh Bhatia (see [2]?C[10]) are generalized and some new results are established.  相似文献   

4.
This paper proposes some estimators for the population mean by adapting the estimator in Singh et al. (2008) [5] to the ratio estimators presented in Kadilar and Cingi 2006 [2]. We obtain mean square error (MSE) equation for all proposed estimators, and show that all proposed estimators are always more efficient than ratio estimator in Naik and Gupta (1996) [3], and Singh et al. (2008) [5]. The results have been illustrated numerically by taking some empirical population considered in the literature.  相似文献   

5.
6.
抽象经济均衡问题解的存在性及其算法   总被引:3,自引:0,他引:3  
张从军  孙敏 《数学进展》2006,35(5):570-580
本文首先研究一类新的向量均衡问题,利用截口定理与KKM定理两种不同的工具证明此类均衡问题解的存在性,接着,把这类向量均衡问题推广到更为一般的情形,随后讨论了具有上下界的均衡问题,它是由Isac,Sehgal和Singh于1999年提出的一个公开问题,本文在一定条件下获得了一个新的解的存在性定理,并构造了一个迭代算法,讨论了算法的收敛性。  相似文献   

7.
The problem of continuation of an input-output mapping to a right invertible mapping is solved. The proposed solution is based on transforming the system to a normal form and solving the problem for such systems. The well-known Singh inversion algorithm is modified to calculate the normal forms. It is proved that each step of the modified algorithm can be realized and the result of the algorithm application is a normal form. A new approach to the parameter identification problem based on the inversion of the input-output mapping is proposed to illustrate the application of the results.  相似文献   

8.
本文在涉及重值的情况下,给出了具有极值亏量和的亚纯函数的一个性质.推广了Singh和Kulkarni的结果.  相似文献   

9.
该文研究如下的弱奇异边值问题: (p(x)y')'=f(x, y),0b0g(x), 0≤b0<1, 边值条件为y(0)=A,αy(1)+β y'(1)=γ 或y'(0)=0,αy(1)+βy'(1)=γ (R.K.Pandey 和 Arvind K.Singh 给出了一种求解此问题的二阶有限差分方法[1]. 在再生核空间中讨论方程解的存在性, 给出一种新的迭代算法,这种迭代算法是大范围收敛的. 给出数值算例并与R. K. Pandey 和Arvind K.Singh 给出的方法进行比较说明该文方法的有效性.  相似文献   

10.
This paper is concerned with the starlikeness of certain normalized functions, analytic in the open unit disk, defined by integral representations. Results due to Caplinger and Singh are extended.  相似文献   

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