拟线性椭圆型方程奇摄动边值问题

本文讨论了拟线性椭圆型方程奇摄动Robin边值问题。在适当的条件下，利用不动点定理，研究了边值问题解的存在唯一性及其渐近性态。     

一类高阶拟线性椭圆型方程奇摄动边值问题

本文讨论了一类拟线性椭圆型方程奇摄动Dirichlet边值问题．在适当的条件下，利用不动点定理，研究了边值问题解的存在唯一性及其渐近性态．     

一类高阶拟线性椭圆型方程奇摄动广义边值问题

讨论了一类拟线性椭圆型方程奇摄动广义边值问题.在适当的条件下,研究了Dirichlet问题广义解的存在、唯一性及其渐近性态.     

非线性椭圆型方程组边值问题的可解性

研究椭圆型方程组Dirichlet边值问题的可解性,利用不动点定理证明了上述问题存在上、下解情形,存在有界非负解,并利用该结论讨论了带参数的椭圆型方程组Dirichlet边值问题通过寻找该问题的上、下解,证明了正参数充分小时,这个问题存在有界正解.这里非线性函数在+∞处可以是超线性的,从而证明了部分椭圆型方程组边值问题中非线性项为超线性时,有界正解的存在性.同时,作为定理的应用,给出了实例.     

一类拟线性椭圆方程边值问题弱解的研究

本文应用上、下解方法和 Leray-Schauder不动点定理 ,证明了一类拟线性椭圆方程边值问题弱解的存在性 ,并且给出了一个应用实例     

拟线性椭圆型方程的非线性边值问题——Sobolev临界指数的情形

本文讨论一类具有Ｓｏｂｏｌｅｖ临界指数的拟线性椭圆型方程非线性边值问题的非平凡解的存在性,利用集中紧原理得到一个存在性结果。     

一类拟线性椭圆方程边值问题弱解的研究

本应用上、下解方法和Learay-Schauder不动点定理，证明了一类拟线性椭圆方程边值问题弱解的存在性,并且给出了一个应用实例。     

一类非线性椭圆型微分方程解的存在唯一性研究

本文考虑一类非线性椭圆型偏微分方程解的存在唯-性问题,通过研究相关线性边值问题的弱特征值性态,根据全局反函数定理,我们得到这类非线性椭圆型方程的可解条件,并给出解的存在唯-性证明,其主要结果推广了有关该问题的已有结论.     

高阶半线性椭圆型方程奇摄动广义Dirichlet边值问题

本文讨论了半线性椭圆型方程奇摄动广义边值问题,在适当的条件下研究了Dirichlet边值问题广义解的存在唯一性及其渐近性态。     

二阶拟线性椭圆型方程一般边值问题解的存在性

在文章[1]与[2]中,曾用了不同的方法证明一个空间变量的拟线性抛物型方程一般边值问题解的存在定理.本文利用与[1]相类似的方法考虑多个自变量椭圆型方程一般边值问题     

Characterization of types of asymptotic discernibility of families of hypotheses

We give a characterization of the types of asymptotic discernibility of families of hypotheses in the case of hypothetical measures that are not, in general, mutually absolutely continuous. The case when the logarithm of the likelihood ratio admits an asymptotic expansion of the type of an expansion with local asymptotic normality is examined in detail. Examples are studied.Translated fromTeoriya Sluchainykh Protsessov, Vol. 15, pp. 64–71, 1987.     

Study of the blow-up of solutions of systems of equations of hydrodynamic type

Mathematical Notes - We study the initial boundary-value problem for three-dimensional systems of equations of pseudoparabolic type. The system is similar to the Oskolkov system, but differs from...     

Distribution of types of symmetry of tensors of high degree

The asymptotic distribution of tensors of degree N in symmetry types is studied in this paper.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 155, pp. 181–186, 1986.     

Singularities of Solutions of One Class of Equations of Continuum Mechanics

We analyze one class of families of integral equations and describe the dependence of the singularities of solutions of integral equations on the dimensions of the families of kernels of equations. On the basis of these results, we propose procedures for the construction of approximate solutions for a small parameter.     

Determination of asymptotic solutions of problems of nonlinear theories of thermoviscoelasticity

It is shown that the asymptotic solution of a problem of the nonlinear theory of thermoviscoelasticity, if it exists, can be found directly from the solution of the asymptotic boundary-value problem without completely solving the starting problem.M. V. Lomonosov Moscow State University. Translated from Mekhanika Polimerov, No. 3, pp. 395–400, May–June, 1976.     

Emptiness of set of points of lower semicontinuity of Lyapunov exponents

We consider parametric families of differential systems with coefficients that are bounded and continuous on the half-line and uniformly in time continuously depend on a real parameter. For each Lyapunov exponent, we construct a family such that the Lyapunov exponent of its systems treated as a function of the parameter is not a lower semicontinuous function for any value of the parameter.     

图表示范畴的两个子范畴

引进图表示范畴的两个子范畴,研究它们的同调性质。