共查询到20条相似文献,搜索用时 15 毫秒
1.
Marzia De Donno 《随机分析与应用》2013,31(6):1167-1188
Abstract In the framework of the theory of stochastic integration with respect to a family of semimartingales depending on a continuous parameter, introduced by De Donno and Pratelli as a mathematical background to the theory of bond markets, we analyze a special class of integrands that preserve some nice properties of the finite-dimensional stochastic integral. In particular, we focus our attention on the class of processes considered by Mikulevicius and Rozovskii for the case of a locally square integrable cylindrical martingale and which includes an appropriate set of measure-valued processes. 相似文献
2.
We investigate the notion of nilpotency class of a finite group from a character theoretical point of view. 相似文献
3.
Ram U. Verma 《Journal of Mathematical Analysis and Applications》1999,240(2):361
Some results on a generalized class of minimax inequalities based on the r–I–G–H-KKM mapping theorems in a G–H-space setting are presented. The r–I–G–H-KKM mappings represent a new class of KKM mappings in G–H-spaces as well as in the interval spaces. 相似文献
4.
In this note, we discuss a class of so-called generalized sampling functions. These functions are defined to be the inverse Fourier transform of a family of piecewise constant functions that are either square integrable or Lebegue integrable on the real number line. They are in fact the generalization of the classic sinc function. Two approaches of constructing the generalized sampling functions are reviewed. Their properties such as cardinality, orthogonality, and decaying properties are discussed. The interactions of those functions and Hilbert transformer are also discussed. 相似文献
5.
6.
7.
This paper deals with the hamiltonicity problem of the generalized Petersen graphs P (n, 4), n ≥ 9. A new method is represented to determine the set of all hamiltonian cycles H(n, 4) in P(n, 4), n ≥ 9. 相似文献
8.
《Finite Fields and Their Applications》2001,7(2):355-371
We build a class of codes using hermitian forms and the functional trace code. Then we give a general expression of the rth minimum distance of our code and compute general bounds for the weight hierarchy by using exponential sums. We also get the minimum distance and calculate the rth generalized Hamming weight dr in some special cases. 相似文献
9.
一类广义非线性隐拟变分包含 总被引:5,自引:0,他引:5
引入和研究了一类新的涉及集值极大单调映象的广义非线性隐拟变分包含.对此类变分包含在没有紧性假设下证明了解的存在定理.为寻求此类变分包含的近似解,建议和分析了一个新的迭代算法.给出了由新算法产生的迭代序列的收敛性.作为特殊情形,也讨论了在此领域内的某些已知结果. 相似文献
10.
H. Kharaghani 《Designs, Codes and Cryptography》2003,30(2):139-149
Let q be a prime power and m a positive integer. A construction method is given to multiply the parametrs of an -circulant BGW(v=1+q+q
2+·+q
m
, q
m
, q
m
–q
m–1) over the cyclic group C
n
of order n with (q–1)/n being an even integer, by the parameters of a symmetric BGW(1+q
m+1, q
m+1, q
m+1–q
m
) with zero diagonal over a cyclic group C
vn to generate a symmetric BGW(1+q+·+q
2m+1,q
2m+1,q
2m+1–q
2m) with zero diagonal, over the cyclic group C
n
. Applications include two new infinite classes of strongly regular graphs with parametersSRG(36(1+25+·+252m+1),15(25)2m+1,6(25)2m+1,6(25)2m+1), and SRG(36(1+49+·+492m+1),21(49)2m+1,12(49)2m+1,12(49)2m+1). 相似文献
11.
In this paper, we develop a new mathematical strategy to create flexible lifetime distributions. This strategy is based on a special general-ized mixture derived to the one involved in the so-called weighted exponential distribution. Thus, we introduce a new class of lifetime distributions called "special generalized mixture" class and discussed its qualities. In particular, a short list of new lifetime distributions is presented in details, with a focus on the one based on the Lomax distribution. Different mathematical proper-ties are described, including distributional results, diverse moments measures, incomplete moments, characteristic function and bivariate extensions. Then, the applicability of the new class is investigated through the model parameters based on the Lomax distribution and the analysis of a practical data set. 相似文献
12.
This paper deals with the hamiltonicity problem of the generalized Petersen graphs P(n, 4), n ≥ 9, and is a continuation of [6]. 相似文献
13.
Monica Patriche 《Numerical Functional Analysis & Optimization》2014,35(7-9):1152-1173
We introduce new types of systems of generalized quasi-variational inequalities and we prove the existence of the solutions by using results of pair equilibrium existence for free abstract economies. We consider the fuzzy models and we also introduce the random free abstract economy and the random equilibrium pair. The existence of the solutions for the systems of quasi-variational inequalities comes as consequences of the existence of equilibrium pairs for the considered free abstract economies. 相似文献
14.
In terms of Taylor coefficients and distribution of zeros, we describe the class of entire functions f defined by the convergence of the integral
, where is a slowly increasing function. 相似文献
15.
Toeplitz矩阵Tn=(ti-j)ni,j=0在信号处理、系统理论、逼近论、正交多项式、积分方程数值解等许多领域常常遇到.易知,Toeplitz矩阵Tn的逆矩阵一般不再是Toeplitz矩阵.1972年,Gohberg和Semencul[1]给出... 相似文献
16.
《数学学报(英文版)》2016,(5)
The Bogomolov multiplier B_0(G) of a finite group G is defined as the subgroup of the Schur multiplier consisting of the cohomology classes vanishing after restriction to all abelian subgroups of G.The triviality of the Bogomolov multiplier is an obstruction to Noether's problem.We show that if G is a central product of G_1 and G_2,regarding K_i ≤ Z(G_i),i = 1,2,and θ:G_1→G_2 is a group homomorphism such that its restriction θ_(K_1):K_1→K_2 is an isomorphism,then the triviality of B_0(G_1/K_1),B_0(G_1) and B_0(G_2) implies the triviality of B_0(G).We give a positive answer to Noether's problem for all 2-generator p-groups of nilpotency class 2,and for one series of 4-generator p-groups of nilpotency class 2(with the usual requirement for the roots of unity). 相似文献
17.
The aim of this paper is to introduce a group containing the mapping class groups of all genus zero surfaces. Roughly speaking, such a group is intended to be a discrete analogue of the diffeomorphism group of the circle. One defines indeed a universal mapping class group of genus zero, denoted
The latter is a nontrivial extension of the Thompson group V (acting on the Cantor set) by an inductive limit of pure mapping class groups of all genus zero surfaces. We prove that
is a finitely presented group, and give an explicit presentation of it. 相似文献
18.
Given a family of real-valued functions defined in a normed vector space X, we study a class of -convex functions having a simpler representation for the --subdifferential. The case =X* with X being a Banach space (the Fenchel case) is particularly analysed, and we find that the sublinear lower semicontinuous functions satisfy the simpler representation with respect to X*. As a side result, we provide various new subdifferential-type charaterizations of positively homogeneous functions among those which are lower semicontinuous and convex. In addition, we also discuss that family related to the the so-called prox-bounded functions. In this more general framework our simpler representation may give rise to a new notion of enlargement of the subdifferential.Mathematics Subject Classifications (2000) 47H05, 46B99, 47H17.This work is based on research material supported in part by CONICYT-Chile through FONDECYT 101-0116 and FONDAP-Matemáticas Aplicadas II. 相似文献
19.
In this paper, the authors consider a class of generalized curve flow for convex curves in the plane. They show that either the maximal existence time of the flow is finite and the evolving curve collapses to a round point with the enclosed area of the evolving curve tending to zero, i.e., limt→T A(t) = 0, or the maximal time is infinite, that is, the flow is a global one. In the case that the maximal existence time of the flow is finite, they also obtain a convergence theorem for rescaled curves at the maximal time. 相似文献
20.
P. H. Sach 《Journal of Optimization Theory and Applications》2008,139(2):337-350
This paper considers the following generalized vector quasiequilibrium problem: find a point (z
0,x
0) of a set E×K such that x
0∈A(z
0,x
0) and
where α is a subset of 2
Y
×2
Y
, A:E×K→2
K
, B:E×K×K→2
E
, C:E×K×K→2
Y
, F:E×K×K→2
Y
are set-valued maps and Y is a topological vector space. Existence theorems are established under suitable assumptions, one of which is the requirement
of the openness of the lower sections of some set-valued maps which can be satisfied with maps B,C, F being discontinuous. It is shown that, in some special cases, this requirement can be verified easily by using the semicontinuity
property of these maps. Another assumption in the obtained existence theorems is assured by appropriate notions of diagonal
quasiconvexity.
The author thanks the referees for valuable comments. 相似文献