具有一致连续生成元和可积参数的倒向随机微分方程

本文建立了具有可积参数的一维倒向随机微分方程(BSDE) 的一个新的存在唯一性结果, 其中BSDE 的生成元g 关于y 满足Osgood 条件且关于z 是α-Hölder (0 < α < 1) 连续的.     

z一致连续的倒向随机微分方程解的一个存在唯一性结果

建立了关于一维倒向随机微分方程(简写为BSDE)的一个存在唯一性结果,其中BSDE的生成元g关于y满足Constantin条件,关于z是一致连续的.这改进了一些已知结果.     

随机Lipschitz条件下一般时间终端的多维BSDE解的存在唯一性

某个新的范数空间上利用压缩映像原理,在生成元g满足对二元组■均不一致的随机Lipschitz条件下,证明了一般时间终端多维倒向随机微分方程(BSDE)解的存在唯一性,作为推论得到了该类倒向随机微分方程解的递归迭代序列的收敛性.     

有限或无限时间终端多维倒向随机微分方程L~1解的存在唯一性(英文)

建立具有可积参数和有限或无限时间终端的多维倒向随机微分方程(BSDEs)解的一个存在唯一性结果,其中生成元g关于y和z均满足对t不一致的Lipschitz连续条件.通过建立解的先验估计证明解的唯一性,然后通过Picard迭代证明解的存在性.     

Lp(1＜p＜∞)上下半连续函数的HÖLDER次微分逼近中值定理

建立Banach空间上次微分的逼近中值定理,关键是对连续凸函数g,f的次微分f必须满足 (f+λg)(x) f(x)十λg(x),该文在Lp上对H lder次微分来证明上述性质,由此建立H lder次微分下的逼近中值定理.     

Lp(1＜p＜∞)上下半连续函数的HOLDER次微分逼近中值定理

建立Banach空间上次微分的逼近中值定理,关键是对连续凸函数g,f的次微分f必须满足 (f+λg)(x) f(x)十λg(x),该文在Lp上对H lder次微分来证明上述性质,由此建立H lder次微分下的逼近中值定理.     

H(o)lder连续性与自由不连续问题的极小

讨论了自由不连续问题极小的H(o)lder连续性,即证明在奇异集的小邻域外部,极小函数是H(o)lder连续的,但相反结论不成立.     

上下半连续函数的H〖AKO¨〗LDER次微分逼近中值定理

建立Banach空间上次微分的逼近中值定理，关键是对连续凸函数g,f的次微分f必须满足(f+λg)(x)f(x)+λg(x)，该文在Lp上对H〖AKo¨D〗lder次微分来证明上述性质，由此建立H〖AKo¨D〗lder次微分下的逼近中值定理。     

带有随机生成元的倒向随机微分方程的共单调定理

该文利用Malliavin微分的方法研究带有随机生成元的倒向随机微分方程 (简记BSDE),给出了关于比较某些BSDE的解(y,z)中z的方法, 在此基础上继续研究(y,z)的某些重要性质, 指明了当BSDE的生成元是随机的情况下,Zengjing Chen等人文章中得到的共单调定理是不成立的, 然后寻找带有随机生成元的BSDE的共单调定理成立的特殊情况, 最后研究了一类g -期望的可加性以及Choquet积分表示定理.     

一个障碍问题解梯度的 Hlder 连续性

证明一个变分不等式单侧障碍问题解梯度的 H(o|¨)lder 连续性,证实了 Lindqvist的一个猜想.     

On a class of self-similar processes with stationary increments in higher order Wiener chaoses

We study a class of self-similar processes with stationary increments belonging to higher order Wiener chaoses which are similar to Hermite processes. We obtain an almost sure wavelet-like expansion of these processes. This allows us to compute the pointwise and local Hölder regularity of sample paths and to analyse their behaviour at infinity. We also provide some results on the Hausdorff dimension of the range and graphs of multidimensional anisotropic self-similar processes with stationary increments defined by multiple Wiener–Itô integrals.     

A REPRESENTATION FORMULA RELATED TO SCHR(O)DINGER OPERATORS

Schr(o)dinger operator is a central subject in the mathematical study of quantum mechanics.Consider the Schrodinger operator H = -△ V on R, where △ = d2/dx2 and the potential function V is real valued. In Fourier analysis, it is well-known that a square integrable function admits an expansion with exponentials as eigenfunctions of -△. A natural conjecture is that an L2 function admits a similar expansion in terms of "eigenfunctions" of H, a perturbation of the Laplacian (see [7], Ch. Ⅺ and the notes), under certain condition on V.     

On a class of Riemann surfaces

It is considered the class of Riemann surfaces with dimT1 = 0, where T1 is a subclass of exact harmonic forms which is one of the factors in the orthogonal decomposition of the spaceΩH of harmonic forms of the surface, namely The surfaces in the class OHD and the class of planar surfaces satisfy dimT1 = 0. A.Pfluger posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimT1 = 0 among the surfaces of the form Sg\K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary.     

CONTENTS OF VOLUME 30

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Instructions for contributions

正Applied Mathematics-A Journal of Chinese Universities,Series B(Appl.Math.J.Chinese Univ.,Ser.B)is a comprehensive applied mathematics journal jointly sponsored by Zhejiang University,China Society for Industrial and Applied Mathematics,and Springer-Verlag.It is a quarterly journal with     

Journal of Mathematical Research with Applications Guide for Authors

正Journal overview:Journal of Mathematical Research with Applications(JMRA),formerly Journal of Mathematical Research and Exposition(JMRE)created in 1981,one of the transactions of China Society for Industrial and Applied Mathematics,is a home for original research papers of the highest quality in all areas of mathematics with applications.The target audience comprises:pure and applied mathematicians,graduate students in broad fields of sciences and technology,scientists and engineers interested in mathematics.     

Staircase transportation problems with superadditive rewards and cumulative capacities

A cumulative-capacitated transportation problem is studied. The supply nodes and demand nodes are each chains. Shipments from a supply node to a demand node are possible only if the pair lies in a sublattice, or equivalently, in a staircase disjoint union of rectangles, of the product of the two chains. There are (lattice) superadditive upper bounds on the cumulative flows in all leading subrectangles of each rectangle. It is shown that there is a greatest cumulative flow formed by the natural generalization of the South-West Corner Rule that respects cumulative-flow capacities; it has maximum reward when the rewards are (lattice) superadditive; it is integer if the supplies, demands and capacities are integer; and it can be calculated myopically in linear time. The result is specialized to earlier work of Hoeffding (1940), Fréchet (1951), Lorentz (1953), Hoffman (1963) and Barnes and Hoffman (1985). Applications are given to extreme constrained bivariate distributions, optimal distribution with limited one-way product substitution and, generalizing results of Derman and Klein (1958), optimal sales with age-dependent rewards and capacities.To our friend, Philip Wolfe, with admiration and affection, on the occasion of his 65th birthday.Research was supported respectively by the IBM T.J. Watson and IBM Almaden Research Centers and is a minor revision of the IBM Research Report [6].