EFFECTIVE DYNAMICS OF A COUPLED MICROSCOPIC-MACROSCOPIC STOCHASTIC SYSTEM

A conceptual model for microscopic-macroscopic slow-fast stochastic systems is considered. A dynamical reduction procedure is presented in order to extract effective dynamics for this kind of systems. Under appropriate assumptions, the effective system is shown to approximate the original system, in the sense of a probabilistic convergence.     

二维不可压Euler方程的定常涡解

本文主要介绍描述理想流体运动的二维不可压Euler方程定常涡解的研究进展,特别是在定常流体中关于涡解的构造及其渐近行为的研究所得到的一些结果.此外,本文也介绍两个相关问题的类似结果.     

董光昌先生简介

董光昌先生1928年1月出生于江西省浮梁县,1950年毕业于浙江大学数学系,毕业后即留校任教,历任浙江大学应用数学研究所所长和高等学校工科应用数学专业教材编审委员会副主任等职务,并创办了《高校应用数学学报》.1957–1958年在中国科学院数学研究所进修,1978年晋升为教授.由于成绩突出,1981年由国务院批准为首批博士生导师.他在1979–1981年期间赴美国Courant数学研     

INFINITELY MANY SOLUTIONS FOR AN ELLIPTIC PROBLEM INVOLVING CRITICAL NONLINEARITY

We study the following elliptic problem:{-div(a(x)Du)=Q(x)|u|2-2u+λu x ∈Ω ,u=0 on ΩUnder certain assumptions on a and Q, we obtain existence of infinitely many solutions by variational method.     

一类m-点边值问题的正解

§ 1　 IntroductionIn[1 ] ,Karakostas and Tsamatos studied the existence of positive solutions for two-pointboundary value problemx″+ sign( 1 -c) q( t) f( x,x′) x′=0 ,( 1 .1 )x( 0 ) =0 ,x′( 1 ) =cx′( 0 ) ,( 1 .2 )where c∈ ( 0 ,1 )∪ ( 1 ,∞ ) .By using indices ofconvergence ofthe nonlinearity at0 and +∞and fixed point theorem in cones,they provided a priori upper and lower bounds for theslope of the solutions.The“c∈ ( 0 ,1 ) part”of their results has been extended to the fol-lowing …