广义生-灭最小Q过程的常返、遍历性

研究具有突变率的全稳定广义生-灭最小Q过程的常返性和遍历性,在Q-矩阵是正则、不可约的条件下,利用Q过程的构造理论,获得广义生-灭最小Q过程是常返、遍历的易于检验的充分必要条件,并给出不变测度.     

有限流入满足向前方程组的Q过程的构造

本文彻底解决了有限流入满足向前方程组的 Q 过程的构造问题.     

含瞬时态、具有突变率的广义生-灭Q-矩阵(Ⅱ)

研究含瞬时态、具有突变率的广义生-灭拟q-矩阵,在QE0o非零流出下,给出易于验证的Q过程存在性准则,并构造出全部Q过程和全部诚实Q过程,证明了不需附加任何条件,所有诚实Q过程都是遍历的,并求出其遍历测度以及给出诚实Q过程可配称的充要条件.最后给出两个例子以说明本文的结果易于验证.     

含瞬时态、具有突变率的广义生-灭Q-矩阵(Ⅱ)

研究含瞬时态、具有突变率的广义生-灭拟q-矩阵,在Q_(E_0)非零流出下,给出易于验证的Q过程存在性准则,并构造出全部Q过程和全部诚实Q过程,证明了不需附加任何条件,所有诚实Q过程都是遍历的,并求出其遍历测度以及给出诚实Q过程可配称的充要条件。最后给出两个例子以说明本文的结果易于验证。     

含瞬时态、具有突变率的广义生-灭Q-矩阵(I)

研究含瞬时态、具有突变率的广义生-灭拟q-矩阵,给出易于验证的Q过程存在性准则,并构造出全部Q过程和全部诚实Q过程,证明了不需附加任何条件,所有诚实Q过程都是常返的,给出诚实Q过程是遍历的充要条件,并求出其遍历测度,以及证明了不存在可配称Q过程.最后给出两个例子以说明我们的结果易于验证.     

含瞬时态、具有突变率的广义生-灭Q-矩阵(Ⅰ)

研究含瞬时态、具有突变率的广义生-灭拟q-矩阵,给出易于验证的Q过程存在性准则,并构造出全部Q过程和全部诚实Q过程,证明了不需附加任何条件,所有诚实Q过程都是常返的,给出诚实Q过程是遍历的充要条件,并求出其遍历测度,以及证明了不存在可配称Q过程.最后给出两个例子以说明我们的结果易于验证.     

一类含瞬时态的Q—矩阵

设■其中0≤b_1<∞,0≤q_1<∞,i≥1。本文分别给出了Q为Q-矩阵及诚实Q-矩阵的充要条件,并证明了,如果Q是Q-矩阵,则存在无穷多个诚实Q-过程,对于含有限多个瞬时态的对角形Q-矩阵,也得到类似结果。本文所构造的Q-过程可以用其拉氏变换明显表达出来。     

含有限个瞬时态诚实Q过程的唯一性准则

本文对含有限个瞬时态的拟Q-矩阵给出了诚实Q过程存在且唯一的准则。     

不可和单瞬时Q—矩阵的特征

当有瞬时态存在时,Q 过程的存在问题十分困难,至今结果尚不多。本文考虑单瞬时态。对瞬时态不可和的情况,本文给出了 B 型单瞬时态 Q 过程的存在性准则及不中断 B 型单瞬时态 Q 过程的存在准则。从而对不可和单瞬时 Q 矩阵的特征给出了进一步的刻划。     

带马尔可夫切换的Q过程的遍历性

本文应用Foster-Lyapunov不等式和耦合方法,研究了一类带马尔可夫切换的Q过程的指数遍历性和强遍历性; 同时,也构造了一些关于这类带马尔可夫切换的Q过程的耦合,并证明某些耦合是成功的.     

ON THE JOINT SPECTRUM FOR N-TUPLE OF HYPONORMAL OPERATORS

Let A=(A_1,…,A,)be an n-tuple of double commuting hyponormal operators.It is-proved that:1.The joint spectrum of A has a Cartesian decomposition:Re[Sp(A)]=S_p(ReA),Im[Sp(A)]=Sp(ImA);2.The.joint resolvent of A satisfies the growth condition:‖()‖=1/(dist(z,Sp(A)));3.If 0σ(A_i),i=1,2,…,n,then‖A‖=γ_(sp)(A).     

GLOBAL EXISTENCE OF THE SOLUTIONS OF NONLINEAR PARABOLIC EQUATIONS IN EXTERIOR DOMAINS

This paper deals with the following IBV problem of nonlinear parabolic equation: $$\[\left\{ {\begin{array}{*{20}{c}} {{u_t} = \Delta u + F(u,{D_x}u,D_x^2u),(t,x) \in {B^ + } \times \Omega ,}\{u(0,x) = \varphi (x),x \in \Omega }\{u{|_{\partial \Omega }} = 0} \end{array}} \right.\]$$ where $\[\Omega \]$ is the exterior domain of a compact set in $\[{R^n}\]$ with smooth boundary and F satisfies $\[\left| {F(\lambda )} \right| = o({\left| \lambda \right|^2})\]$, near $\[\lambda = 0\]$. It is proved that when $\[n \ge 3\]$, under the suitable smoothness and compatibility conditions, the above problem has a unique global smooth solution for small initial data. Moreover, It is also proved that the solution has the decay property $\[{\left\| {u(t)} \right\|_{{L^\infty }(\Omega )}} = o({t^{ - \frac{n}{2}}})\]$, as $\[t \to + \infty \]$.     

THE ABSTRACT CAUCHY PROBLEM AND A GENERALIZATION OF THE LUMER-PHILLIPS THEOREM

§１．ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｃｅｎｔｌｙｔｈｅｔｈｅｏｒｙｏｆＣｓｅｍｉｇｒｏｕｐｓｈａｓｅｘｔｅｎｓｉｖｅｌｙｄｅｖｏｌｏｐｏｅｄｂｙｍａｎｙａｕｔｈｏｒｓ（ｓｅｅ［２－８，１４］），ｂｕｔａｎａｔｕｒａｌａｎｄｉｍｐｏｒｔａｎｔｑｕｅｓｔ...     

THE HAUSDORFF MEASURE FOR THE SAMPLE PATH OF THE WESTWATER PROCESS

91.IntroductionTheso-calledWestwaterprocessisthecoordinateprocessunderthepolymermeasureu(g)in3-dimensionsconstructedbyWestwater(see[7,8]),andthepolymermeasurev(g)onCo([O,1]-R')isformallydefinedbywhereC,isthenormalization,gE[o,oo)isacouplingconstant,pistheWienermeasureonCo([o,11-R').Inarecentpaper(see[9]),weprovedthattheHausdorffdimensionofthesamplepathoftheWestwaterprocess{X,,t6[O,1]}isalsotwowithprobability1tou(g).Actually,weprovedin[9]thatgh(ImX)5C,y(g)-a.e.(1.1)m(ImX)5C,y(g)-a.e.(1.…     

THE ATTRACTORS OF PARTIAL DIFFERENTIAL EQUATIONS

§ 1　 IntroductionThe study of nonlinear dynamics is a fascinating problem which is at the very heartofthe understanding ofmany importantproblems ofthe natural sciences.Infinite dimensionaldynamical systems are very important in nonlinear dynamics.For an infinite dimensionaldynamical system,we mainly study the existence and the structure ofthe attractors.Thereare detailed discussions in [1 ] .Itis especially mentioned there thatthe attractors of gradi-ent systems are of simple structure in s…     

A SIMPLICIAL ALGORITHM FOR COMPUTING AN INTEGER ZERO POINT OF A MAPPING WITH THE DIRECTION PRESERVING PROPERTY

A mapping f:Z~n→R~n is said to possess the direction preserving property if fi(x)>0implies fi(y)≥0 for any integer points x and y with ‖x-y‖∞≤1.In this paper,a simplicial algorithm is developed for computing an integer zero point of a mappingwith the direction preserving property.We assume that there is an integer point x~0 withc≤x~0≤d satisfying that max_(1≤i≤n)(x_i-x_i~0)fi(x)>0 for any integer point x withf(x)≠0 on the boundary of H={x∈R~n|c-e≤x≤d e},where c and d are twofinite integer points with c≤d and e=(1,1,…1)~∈R~n.This assumption is impliedby one of two conditions for the existence of an integer zero point of a mapping with thepreserving property in van der Laan et al.(2004).Under this assumption, starting at x~0,the algorithm follows a finite simplicial path and terminates at an integer zero point ofthe mapping.This result has applications in general economic equilibrium models withindivisible commodities.     

线性约束下Hermite-广义反Hamilton矩阵的最佳逼近问题

本文利用对称向量与反对称向量的特征性质,给出了约束矩阵集合非空的充分必要条件及矩阵的一般表达式.运用空间分解理论和闭凸集上的逼近理论,得到了任一n阶复矩阵在约束矩阵集合中的惟一最佳逼近解.     

SOME PROPERTIES OF THE $\[{l_2}\]$-VALUED LONG JAMES BANACH SPACE $\[J(\eta ,{l_2})\]$

The main result of this paper is to show that the bidual $\[J(\eta ,{l_2})\]$ of the long James type $\[{l_2}\]$-valued Banach, space $\[J(\eta ,{l_2})\]$ can be identified with transfinite matrices of scalars $\[{[({b_{a,i}})i \in [0,\omega )]_{a \in [0,\eta )}}\]$ with some conditions and the norm of the element x** in $\[J(\eta ,{l_2})\]$** equals $\[\mathop {\sup }\limits_{\gamma \in [0,\eta )} {\left\| {\sum\limits_{\alpha \in [0,\gamma )} {\sum\limits_{i \in [0,\omega )} {{b_{a,i}}{\phi _{a,i}}} } } \right\|_{J{{(\eta ,l)}^{**}}}}\]$.     

A general law of moment convergence rates for uniform empirical process

Let {X _n ; n ≥ 1} be a sequence of independent and identically distributed U[0,1]-distributed random variables. Define the uniform empirical process $F_n (t) = n^{ - \tfrac{1} {2}} \sum\nolimits_{i = 1}^n {(I_{\{ X_i \leqslant t\} } - t),0} \leqslant t \leqslant 1,\left\| {F_n } \right\| = \sup _{0 \leqslant t \leqslant 1} \left| {F_n (t)} \right| $F_n (t) = n^{ - \tfrac{1} {2}} \sum\nolimits_{i = 1}^n {(I_{\{ X_i \leqslant t\} } - t),0} \leqslant t \leqslant 1,\left\| {F_n } \right\| = \sup _{0 \leqslant t \leqslant 1} \left| {F_n (t)} \right| . In this paper, the exact convergence rates of a general law of weighted infinite series of E {‖F _n ‖ − ɛg ^s (n)}₊ are obtained.