关于古典风险模型的一个联合分布

本文主要讨论古典风险模型矿产瞬间前的余额，破产时的赤字，破产前的最大余额，最后一次破产前的最大余额等的联合分布。     

两相连续铸钢周期Stefan问题的古典解

本文讨论一维情形下两相连续铸钢周期stefan问题,证明了周期古典解的存在性、唯一性和稳定性。     

经典风险模型中破产概率的一个渐近式

本文研究经典风险模型中破产概率的渐近行为．利用几何和的方法，获得了索赔额的分布属于S（γ）．γ〉0。时破产概率的一个局部渐近式．同时．给出了一个具体的数值的例子．     

环上的典型的线性李代数的理想

设Ｒ是有１的交换环，本文证明了：当ｎ〉２时，ｓｌｎ（Ｒ）的理想都是标准的。当２∈Ｒ＾＊，ｎ〉３时，ｓｐｎ（Ｒ）与ｓｏｎ（Ｒ）的理想也都是标准的。     

CLASSICAL R-MATRIX APPROACH TO THE SYSTEM ASSOCIATED WITH THE THREE-WAVE INTERACTION EQUATIONS

1IntroductionTher-matrixmethodisanimportanttoolforstudyingthefinite--dimensionalintegrablesystems.Fromther-matrixformulathecommutativityofmotionintegralsgeneratedfromtheLaxoperatorcanbeeasilyobtained[1].AnrmatrixalsoallowsonetocanonicallyconstructthematrixMoftheLaxpair[:l.In[3],Y.T.WuandX.G.Gengintroduceda3x3matrixspectralproblemwithsixpotentialsasfollowswherethepotentialvectoru=(u12,u21,u135u31)u23,u,,)',Aisaconstantspectralparameter,allaZanda3arethreedistinctconstants,andproposedacorres…     

GLOBAL CLASSICAL SOLUTIONS OF THE BOLTZMANN EQUATION NEAR MAXWELLIANS

Global classical solutions near Maxwellians are constructed for the Bolt.zma.nn equation in a periodic box with angular soft cutoff, that is, -3<γ< 0. The construction of global solution is based on an energy method used in [9].     

BLOW-UP OF CLASSICAL SOLUTIONS TO THE COMPRESSIBLE MAGNETOHYDRODYNAMIC EQUATIONS WITH VACUUM

In this paper, we consider the formation of singularity for the classical solutions to compressible MHD equations without thermal conductivity or infinity electric conductivity when the initial data contains vacuum. We show that the life span of any smooth solution will not be extended to ∞, if the initial vacuum only appears in some local domain and the magnetic field vanishes on the interface that separates the vacuum and non-vacuum state,regardless the size of the initial data or the far field state.     

THE COMPLETE LANGLANDS PARAMETERS CORRESPONDING TO THE REPRESENTATIONS OF THE CLASSICAL GROUPS WITH INTEGRAL REGULAR INFINITESIMAL CHARACTERS

1.CompleteLanglandsParametersandL-PacketsInthissectionwereviewsomebasicfactsfrom[1].Wedenotethesetsofrealnumbers,complexnumbersandintegersbyR,CandZ,respectively.SupposethatGisaconnectedcomplexreductivealgebraicgroup.WehaveanextendedgrouPGrforG,andvGrisanE-groupforGr.WedenotethesetofLanglandsparametersandthesetofgeometricparametersforvGrbYp(vG')andX(VG'),respectively.ThereisanaturalmapfromP(VG')toX(vG').ItinducesabijectionfromequivalenceclassesofLanglandsparameterstogeometricparamet…     

超经典Boussinesq系统的守恒律和自相容源

本文研究了超经典Boussinesq系统.利用已有的超经典Boussinesq方程族及其超哈密顿结构,构造了带自相容源的超经典Boussinesq方程族,并通过引入变量F和G,获得了超经典Boussinesq方程族的守恒律.     

BLOW-UP CRITERION OF CLASSICAL SOLUTIONS FOR THE INCOMPRESSIBLE NEMATIC LIQUID CRYSTAL FLOWS

In this paper,we consider the short time classical solution to a simplified hydrodynamic flow modeling incompressible,nematic liquid crystal materials in R~3. We establish a criterion for possible breakdown of such solutions at a finite time. More precisely,if(u,d)is smooth up to time T provided that ∫_0~T||▽×u(t,·)||_(BMO)(R~3)+||▽d(t,·)||_(L~4(R~3))~8dt∞.     

有相依关系的成败型元件串联系统可靠性经典精确最优置信下限

设有由Ｋ个成败型元件Ａ１，Ａ２，…，ＡＫ组成的串联系统，设Ａ１，Ａ２，…，ＡＫ之间有相依关系，要Ａ１成功的条件下Ａ２才可以试验，在Ａ１，Ａ２，都成功的条件下Ａ３才可以试验，…在Ａ１，Ａ２，…ＡＫ－１都成功的条件下Ａｋ才可以试验，设条件概率Ｐ（Ａｉ│Ａ１Ａ２…Ａｉ－１）ｐｉ，ｐｉ未知，ｉ＝１，２，…，Ｋ。设有样本（Ｘ１，Ｘ２，…，ＸＫ）（Ｘ≥Ｘ２≥…≥ＸＫ），本文用样本点排序法求此串联系统可靠性之经     

理想磁流体动力学方程组经典解的破裂

本文给出了理想磁流体动力学方程组的经典解在初始扰动适当大的情况下破裂的结果.文[1]证明了描述多方理想可压缩气体运动的欧拉系统的经典解在初始扰动适当大的情况下破裂的结果.本文将利用和文[1]相似的方法证明所得定理.     

带对流项的一类奇异Dirichlet问题唯一古典解的渐近行为

设Ω是RN中的C2有界区域,应用问题解的性质,构造比较函数,得到了奇异非线性Dirichlet问题的唯一解u∈C2(Ω)∩C(Ω)满足,这里q∈[0,2],λ,σ是非负参数,,g(s)在(0,∞)是正的单调非增函数且.     

理想磁流体动力学方程组经典解的破裂

本文给出了理想磁流体动力学方程组的经典解在初始扰动适当大的情况下破裂的结果.文[1]证明了描述多方理想可压缩气体运动的欧拉系统的经典解在初始扰动适当大的情况下破裂的结果.本文将利用和文[1]相似的方法证明所得定理.     

POSITIVE CLASSICAL SOLUTIONS OF DIRICHLET PROBLEM FOR THE STEADY RELATIVISTIC HEAT EQUATION

In this paper,for a bounded C² domain,we prove the existence and uniqueness of positive classical solutions to the Dirichlet problem for the steady relativistic heat equation with a class of restricted positive C² boundary data.We have a non-existence result,which is the justification for taking into account the restricted boundary data.There is a smooth positive boundary datum that precludes the existence of the positive classical solution.     

经济环境下引入投资的古典风险模型的破产概率

本文研究经济环境下引入投资的古典风险模型的破产概率,在保险公司有风险投资的情况下,利用鞅方法我们得到了调解系数方程和破产概率的上界.     

THE INTRINSIC QUALITATIVE PROPERTIES OF THE CLASSICAL OPTIMAL STOPPING PROBLEM ARE INVARIANT TO THE FUNCTIONAL FORM OF THE DISCOUNT FUNCTION

Abstract The intrinsic qualitative properties of a generic optimal stopping model are shown to be invariant to the functional form of the discount function. If the discount function is assumed to be a member of particular infinite parametric family—a family that includes the exponential and classical hyperbolic discount functions as special cases—an additional refutable comparative statics result is produced that holds for the entire family. Consequently, if one limits econometric tests of the model to its qualitative properties, one cannot determine the form of the discount function used by the decision maker. It is also shown that the only discount function that yields a time‐consistent stopping rule is the exponential function with a constant rate of discount.     

带对流项的一类奇异Dirichlet问题唯一古典解的渐近行为

设Ω是RN中的C2有界区域,应用问题-p"(s)=g(p(s)),p(s)＞0,s∈(0,∞),p(0)=0,lims→∞ p'(s)=β≥0解的性质,构造比较函数,得到了奇异非线性Dirichlet问题-△u=g(u)+λ|▽u|q+σ,u＞0,x∈Ω,u|(e)Ω=0的唯一解u∈C2(Ω)∩ C(Ω)满足lim d(x)→O u(x)/p(d(x))=ξo,这里q∈[0,2],λ,σ是非负参数,T(ξ0)=lim t→O+ g(ξot)/ξog(t)=1,9(s)在(0,∞)是正的单调非增函数且lim s→O+g(s)=+∞,∫∞ 1 9(s)ds＜∞.     

GLOBAL CLASSICAL SOLUTION TO THE CAUCHY PROBLEM OF THE 3-D COMPRESSIBLE NAVIER-STOKES EQUATIONS WITH DENSITY-DEPENDENT VISCOSITY

In this paper, we consider the global existence of classical solution to the 3-D compressible Navier-Stokes equations with a density-dependent viscosity coefficient λ(ρ)provided that the initial energy is small in some sense. In our result, we give a relation between the initial energy and the viscosity coefficient μ, and it shows that the initial energy can be large if the coefficient of the viscosity μ is taken to be large, which implies that large viscosity μ means large solution.     

基于巴斯卡数据成败型元件串联系统可靠性经典精确置信限

设Ａ为由Ｋ个相互独立的成败型元件组成的串联系统，第ｉ个元件的可靠性ｐｉ，ｐｉ未知，ｉ＝１，２，…，Ｋ．设对第ｉ个元件，对于给定的ｍｉ，有ｎｉ个巴斯卡试验数据：Ｘｉ１，Ｘｉ２，…，Ｘｉｎｉ，其中Ｘｉｊ表示对第ｉ个元件进行试验，试验进行到ｍｉ次成功时所需要的试验次数ｊ＝１，２，…，ｎｉ，ｉ＝１，２，…，Ｋ．记Ｔｉ＝Ｘｉ１＋Ｘｉ２＋…＋Ｘｉｎｉ，ｉ＝１，２，…，ｋ．本文研究基于统计量（Ｔ１，Ｔ２，…，Ｔｋ）求串联系统Ａ的可靠性经典精确最优置信下限．