具有较一般分支特征的超布朗运动轨道性质

本文研究具有较一般分支特征的超布朗运动｛Ｘ（ｔ）｝ｔ０的轨道性质．首先给出了它的一个击中概率的表达式，其次找到了它的支集蔓延速度的估计式及证明了支撑过程的右连续性，从而验证了Ｄａｗｓｏｎ，Ｄ．Ａ．等人的猜想     

超规则Q过程的存在性

对于规则的Q矩阵,即Q保守且Q过程惟一时,证明了超规则Q过程的存在性.特别地,得到超Poisson过程、超规则生灭过程、超规则双边生灭过程、超规则纯生过程、超纯灭过程、超规则分支过程等的存在性.     

分支问题中转接解支的开折方法

分支问题中转接解支的开折方法朱正佑，丛玉豪（兰州大学数学系）ＴＨＥＵＮＦＯＬＤＩＮＧＴＥＣＨＮＩＱＵＥＦＯＲＳＷＩＴＣＨＩＮＧＳＯＬＵＴＩＯＮＢＲＡＮＣＨＥＳＩＮＢＩＦＵＲＣＡＴＩＯＮＰＲＯＢＬＥＭＳ￥ＺｈｕＺｈｅｎｇ－ｙｏｕ；ＣｏｎｇＹｕ－ｈａｏ（...     

极小超曲面上Laplace算子的谱

本文证明了单位球面Ｓ＾ｎ＋１中某些Ｃｌｉｆｆｏｒｄ超曲面，复射影空间和四元数射影空间中广ＹＱ ＬＩＦＦＯＲＤＦＨＶ ＭＡ ＤＭ Ｊ ＭＨ ＡＤＷ Ｈ Ｌａｐｌａｃｅ算子的谱唯一确定。     

GEOMETRIC METHOD OF SEQUENTIAL ESTIMATION RELATED TO MULTINOMIAL DISTRIBUTION MODELS

ＧＥＯＭＥＴＲＩＣＭＥＴＨＯＤＯＦＳＥＱＵＥＮＴＩＡＬＥＳＴＩＭＡＴＩＯＮＲＥＬＡＴＥＤＴＯＭＵＬＴＩＮＯＭＩＡＬＤＩＳＴＲＩＢＵＴＩＯＮＭＯＤＥＬＳ￥ＷＥＩＢＯＣＨＥＮＧ；ＬＩＳＨＯＵＹＥ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，Ｓｏｕｔｈ...     

WEAK CONVERGENCE FOR NON-UNIFORM φ-MIXING RANDOM FIELDS

ＷＥＡＫＣＯＮＶＥＲＧＥＮＣＥＦＯＲＮＯＮＵＮＩＦＯＲＭφＭＩＸＩＮＧＲＡＮＤＯＭＦＩＥＬＤＳＬＵＣＨＵＡＮＲＯＮＧＡｂｓｔｒａｃｔＬｅｔ｛ξｔ，ｔ∈Ｚｄ｝ｂｅａｎｏｎｕｎｉｆｏｒｍφｍｉｘｉｎｇｓｔｒｉｃｔｌｙｓｔａｔｉｏｎａｒｙｒｅａ...     

带移民Jirina过程的弱极限定理

该文在矩条件下讨论了一列带移民Jirina过程的弱极限定理.按照极限过程的不同对矩条件作了简单分类.文章证明了在不同的矩条件下,一列带移民Jirina过程适当规范后可以在Skorokhod空间分别弱收敛到连续分支过程,带移民的连续分支过程,不连续的带移民分支过程以及确定性过程.对最后这种情形,还给出了一个波动极限定理.     

再谈关于C^∞—字幂的一个猜想

设Ｗ是一个Ｃ＾∞－字，且│Ｗ│〉３，若对一切满足│Ｄ＾ｋ（Ｗ）│〉１的自然数ｋ，都有Ｄ＾ｋ（Ｗ）的首末两个循环中至少有一个循环的长为２，则称Ｗ是一个弱偶Ｃ＾∞－字，本文讨论了弱偶Ｃ＾∞－字的性质，证明了以下的结论；基Ｗ是一个弱偶Ｃ＾∞－字，则Ｗ６２不是Ｃ＾∞－字。     

半鞅及其临界停时

本文讨论Ｂ－值Ｒ．Ｒ．Ｃ过程Ｗ的半鞅性及其与临界停时之间的关系，同时给出相应的临界停时的构作方法，并证明过程Ｗ为非半鞅的特征为Ｐ（＜∞）＞０．本文最后讨论两类矢值过程，它们具有一个Ｒ－控制过程，但不为半鞅．     

AN OPTION PRICING PROBLEM WITH THE UNDERLYING STOCK PAYING DIVIDENDS

ＡＮＯＰＴＩＯＮＰＲＩＣＩＮＧＰＲＯＢＬＥＭＷＩＴＨＴＨＥＵＮＤＥＲＬＹＩＮＧＳＴＯＣＫＰＡＹＩＮＧＤＩＶＩＤＥＮＤＳＸＵＷＥＮＳＨＥＮＧ，ＺＨＵＡＮＧＬＩＮＧＡＮＤＷＵＺＨＥＮＡｂｓｔｒａｃｔ．Ｉｎｔｈｉｓｐａｐｅｒ，ａｐｒｉｃｉｎｇｐｒｏｂｌｅｍ...     

p-拟鞅变换

本文研究了p-拟鞅变换的问题.利用Banach空间的几何性质,得到一维和二维参数下拟鞅变换理论,推广了鞅变换的一些结果.     

The multitype branching random walk, II

Limit theorems for the multitype branching random walk as n → ∞ are given (n is the generation number) in the case in which the branching process has a mean matrix which is not positive regular. In particular, the existence of steady state distributions is proven in the subcritical case with immigration, and in the critical case with initial Poisson random fields of particles. In the supercritical case, analogues of the limit theorems of Kesten and Stigum are given.     

关于Rosenblatt过程Wiener积分的随机Fubini定理(英文)

本文得到了一个关于Rosenblatt过程Wiener积分的随机Fubini定理,它可以视为经典Fubini定理的推广.     

Central limit theorems for supercritical branching Markov processes

In this paper we establish spatial central limit theorems for a large class of supercritical branching Markov processes with general spatial-dependent branching mechanisms. These are generalizations of the spatial central limit theorems proved in [1] for branching OU processes with binary branching mechanisms. Compared with the results of [1], our central limit theorems are more satisfactory in the sense that the normal random variables in our theorems are non-degenerate.     

On the reverse process of a critical multitype Galton-Watson process without variances

Limit theorems are established for the reverse process of a critical multitype Galton-Watson process without variances. These results are an extension of those of Nakagawa |5| in the case with finite variances.     

Convergence of over-relaxed contraction-proximal point algorithm in Hilbert spaces

The proximal point algorithm (PPA) is a classical method for finding zeros of maximal monotone operators. It is known that the algorithm only has weak convergence in a general Hilbert space. Recently, Wang, Wang and Xu proposed two modifications of the PPA and established strong convergence theorems on these two algorithms. However, these two convergence theorems exclude an important case, namely, the over-relaxed case. In this paper, we extend the above convergence theorems from under-relaxed case to the over-relaxed case, which in turn improve the performance of these two algorithms. Preliminary numerical experiments show that the algorithm with over-relaxed parameter performs better than that with under-relaxed parameter.     

树上路径过程的随机路径条件概率的强极限定理

本文研究了树上路径过程随机转移概率和状态序偶出现频率的强极限定理.通过利用若干重要不等式,获得了树上路径过程的随机路径条件概率用不等式表示的几何平均强极限定理以及树上路径过程关于状态序偶出现频率的用不等式表示的强极限定理,所得结果推广了树上马氏链及非齐次马氏链中的结果.     

Inverse and saturation theorems for radial basis function interpolation

While direct theorems for interpolation with radial basis functions are intensively investigated, little is known about inverse theorems so far. This paper deals with both inverse and saturation theorems. For an inverse theorem we especially show that a function that can be approximated sufficiently fast must belong to the native space of the basis function in use. In case of thin plate spline interpolation we also give certain saturation theorems.

     

General theorems on large deviations for random vectors

In the paper, we present some general theorems on large deviations of random vectors with cumulants satisfying the generalized Statulevi?ius condition. The results obtained are applicable in derivation of limit theorems in the scheme of series, including the case where the dimension of the considered random vectors is growing indefinitely.     

非线性项有非线性增长的高阶多点边值问题

本文考虑以下高阶多点边值问题：，其中关于f有非线性增长的情况，利用基于度理论的不动点定理，对上述边值问题建立了存在唯一性定理．