具有时滞的Rayleigh方程周期解的存在性与唯一性

本文研究了具有偏差变元的Rayleigh方程周期解的存在性和唯一性.利用Mawhin连续性定理,得到了该方程周期解存在性和唯一性的新结果,改进了一些已有结果.     

以局部有限测度为初值的拟线性退化双曲方程 BV解的存在唯一性

本文讨论了下列拟线性退化双曲方程ut+ψ(u)x=0,以σ-有限的Borel测度为初值条件的Cauchy问题解的存在唯一性,其中ψ在R上是连续的非减的函数.     

以局部有限测度为初值的拟线性退化双曲方程BV解的存在唯一性

本文讨论了下列拟线性退化双曲方程ut (?)(u)x=0,以σ-有限的Borel测度为初值条件的Cauchy问题解的存在唯一性,其中在R上是连续的非减的函数.     

THE ANALYSIS OF EXISTENCE AND UNIQUENESS OF SOLUTIONS FOR SECOND ORDER LINEAR SINGULAR DIFFERENTIAL DIFFERENCE EQUATION WITH DELAY

1IntroductionaccallthefollowingequationssingularfunctionaldifferentialequationsdenotedbySFDE.WhereAisanxmconstantmatrix,dctA=0whenn=m,x(t)ER",tEThebasictheoryofFDEhasbeenwellestablished.ComparedwithFDE,theSFDEismuchmorecofllplicated,whichisshowninthispaper.Inregardtothesingularsystemswithoutdelay,therearemailyresults.ButtherearefewresultsonSingularsystemswithdelay,andtherearcmanyinterestingproblemstobestudiedonthisclassofsystems.Peoplehavediscussedthelinearordinarydifferentialequation…     

EXISTENCE AND UNIQUENESS OF SOLUTIONS TO STOCHASTIC DIFFERENTIAL EQUATION WITH RANDOM COEFFICIENTS

This paper mainly deals with a stochastic differential equation (SDE) with random coefficients. Sufficient conditions which guarantee the existence and uniqueness of solutions to the equation are given.     

时滞Li

结合构造Liapunov泛函,研究了时滞Liénard方程概周期解的存在唯一性.     

时滞Liénard方程概周期解的存在唯一性

结合构造Ｌｉａｐｕｎｏｖ泛函,研究了时滞Ｌｉｅｎａｒｄ方程概周期解的存在唯一性．     

正α齐次超线性算子方程正解的存在唯一性及其应用

本文研究了正α齐次超线性算子方程（|α|＞1）正解的存在唯一性,将已有结果作了本质的改进,并把新的结果成功地应用于超线性问题．     

THE EXISTENCE AND UNIQUENESS OF THE SOLUTIONS OF DAES

1Intr0ducti0nDifferential-algebraicequations(DAEs)areveryusefu1inwidefields(cf.[1]).Bydifferential-algebraicequations,wemeanthoseequati0nswhosepartsof"derivative"cann0tbeexpressedexplicitly.Forexample,weconsidertheimplicitdifferentialequationwithmappingFsm00thssufficient1y.Itisusuallyreferredt0adifferential-algebraicequation(DAE)whentherank0fD.F(t,x,p)islessthann,wheretheremightbesomepurea1gebraic,whichwecallc0nstraintequations.TheDAEs,inparticular,theexistenceanduniquenessofitssolutions…     

EXISTENCE AND UNIQUENESS OF SOLUTIONS FOR NONLINEAR BOUNDARY VALUE PROBLEMS OF VOLTERRA－HAMMERSTEIN TYPE INTEGRODIFFERENTIAL EQUATION

ＥＸＩＳＴＥＮＣＥＡＮＤＵＮＩＱＵＥＮＥＳＳＯＦＳＯＬＵＴＩＯＮＳＦＯＲＮＯＮＬＩＮＥＡＲＢＯＵＮＤＡＲＹＶＡＬＵＥＰＲＯＢＬＥＭＳＯＦＶＯＬＴＥＲＲＡ－ＨＡＭＭＥＲＳＴＥＩＮＴＹＰＥＩＮＴＥＧＲＯＤＩＦＦＥＲＥＮＴＩＡＬＥＱＵＡＴＩＯＮ￥ＷａｎｇＧ...     

具非线性非局部边界条件的一类多孔介质方程解的整体存在与爆破

本文研究了具有非线性非局部边界条件的一类退化型多孔介质方程.利用比较原理和上下解的方法,获得了方程的解是否在有限时刻爆破或整体存在的准则,这些结果表明,权重函数g(x,y)及指数l的大小对于问题解的爆破与否起着关键的作用.最后研究了爆破解的爆破率.     

混合单调算子方程解存在与唯一性定理及应用

本文在不假定算子具有紧性，连续性或对称压缩的条件下，研究了混合单调算子方程解的存在与唯一性。     

含随机参数非线性方程组解的存在性、唯一性及算法与效用函数计算公式的导出

1 引 言在决策分析及若干非确定性经济分析中,如何确定行为人效用函数及其计算公式,是迄今仍未解决的重大问题.近些年有多项研究均涉及此问题[1,2,3,4].Multiple Degree RiskAversion模型[5,6],可通过鉴别行为人风险性质,把上述效用函数及其参数的确定归结为求解由所定义函数构造的一种非线性方程组.这里,用途最广也最具代表性的风险性质为递减风险厌恶[7].其效用函数及其参数可由关于未知量ψ1,ψ2的两个联立非线性方程     

一类带有反应项的趋化性方程组解的存在唯一性

本文研究了主方程中带有反应项的Keller-Segel趋化性模型.利用截断函数、半群算子和不动点定理,获得了范数估计以及模型局部解的存在唯一性.     

EXISTENCE AND UNIQUENESS OF SOLUTIONS TO A NONLINEAR FRACTIONAL DIFFERENTIAL EQUATION

The initial value problem of a nonlinear fractional differential equation is discussed in this paper. Using the nonlinear alternative of Leray-Schauder type and the contraction mapping principle,we obtain the existence and uniqueness of solutions to the fractional differential equation,which extend some results of the previous papers.     

EXISTENCE AND UNIQUENESS OF SOLUTIONS TO A BACKWARD STOCHASTIC DIFFERENTIAL EQUATION

A backward stochastic diferential equation is discussed in this paper. Under some weaker conditions than uniformly Lipschitzian condition given by Pardoux and Peng(1990), using Picard interaction and Cauchy sequence, the existence and uniqueness of the solutions to the backward stochastic diferential equation.     

THE EXISTENCE AND UNIQUENESS AND STABILITY OF ALMOST PERIODIC SOLUTIONS FOR FUNCTIONAL DIFFERENTIAL EQUATIONS WITH INFINITE DELAYS

ＴＨＥＥＸＩＳＴＥＮＣＥＡＮＤＵＮＩＱＵＥＮＥＳＳＡＮＤＳＴＡＢＩＬＩＴＹＯＦＡＬＭＯＳＴＰＥＲＩＯＤＩＣＳＯＬＵＴＩＯＮＳＦＯＲＦＵＮＣＴＩＯＮＡＬＤＩＦＦＥＲＥＮＴＩＡＬＥＱＵＡＴＩＯＮＳＷＩＴＨＩＮＦＩＮＩＴＥＤＥＬＡＹＳＷＡＮＧＱＵＡＮＨＮＹ...     

THE EXISTENCE AND LOCAL UNIQUENESS OF MULTI-PEAK POSITIVE SOLUTIONS TO A CLASS OF KIRCHHOFF EQUATION

In the present paper, we consider the nonlocal Kirchhoff problem ■,where a, b 0, 1 p 5 and ■ 0 is a parameter. Under some assumptions on Q(x),we show the existence and local uniqueness of positive multi-peak solutions by LyapunovSchmidt reduction method and the local Pohozaev identity method, respectly.     

带梯度障碍的抛物型变分不等式解的存在性唯一性和正则性

本文讨论带梯度障碍的抛物型变分不等式解的存在性、唯一性和正则性问题．通过证明一类带梯度障碍的问题的求解等价于解某个双边障碍的问题，并利用双边障碍问题解的存在性、唯一性和正则性，得到了带梯度障碍的问题的相应结果．这一方法将有助于对具有梯度约束的非线性以及完全非线性抛物型方程解的正则性的研究．