退化椭圆型障碍问题弱解的边界正则性

本文研究包含于R~N的有Lipschitz边界的有界区域Ω上涉及到 p-Laplacian算子的退化椭圆障碍问题弱解的边界正则性,得到了C_(loc)~(1,α)边界正则性。     

非线性椭圆障碍问题弱解的内部正则性

我们讨论具有C1,β障碍函数的非线性障碍问题弱解的内部正则性,得到了C1lo,cα的正则性结果.     

一类退缩的椭圆型方程弱解的正则性

本文给出了一类退缩的拟线性椭圆型方程－Ｄｉｖ「↓ｕ｜＾ｐ－２↓ｕ＋Ｆ（ｘ,ｕ）」＝Ｂ（ｘ,ｕ,↓ｕ）在Ｗ＾１,ｐ（Ω）中弱解的Ｃ＾１,λｌｏｃ（Ω）正则性,其中Ω为Ｒ＾Ｎ中行一区域。     

障碍问题解的内正则性

对非幂次增长的障碍问题 :∫Ωai(x,u,Du) φ xidx + ∫Ωb(x,u,Du)φ dx≥ 0　　这里φ(x)≥ψ(x) - u(x) ,u(x)≥ψ(x) ,而φ∈ W1 0 LM(Ω ) ,ψ为局部 Holder连续的 ,我们得到其在 W1 LM(Ω)中弱解的 C0 ,αloc 正则性     

一类椭圆型方程障碍问题很弱解的局部正则性

本文研究一类非齐次二阶椭圆型方程-divA(x,u,Du)=B(x,u,Du)的Krψ,θ(Ω)-障碍问题的很弱解.利用Hodge分解的方法及逆Hlder不等式,给出非齐次方程的障碍问题很弱解的局部正则性.由于B(x,u,Du)中u和Du的增长指数为次临界,为了得到局部正则性,我们对同一积分项使用了两次Young和Hlder不等式的技巧.     

各向异性的椭圆方程障碍问题弱解的局部正则性(英文)

本文在适当的假设下研究各向异性的非线性椭圆方程-divA(x,Du)=B(x,u,Du),使用各向异性的逆Hlder不等式和Sobolev不等式,得到椭圆方程障碍问题的弱解的局部正则性,推广了A-调和方程-divA(x,Du)=0的相关结果.     

具有临界指数的半线性椭圆组弱解的正则性

本文研究具有临界指数的方程组。用ＤｅＧｉｏｒｇｅ估计方法，获得方程组的解的有界性。     

一类退缩椭园型方程弱解的正则性

本文得出一类形如：－Ｄｉｖ（ｇ（｜Ｄｕ｜）｜Ｄｕ｜＾ｐ－２Ｄｕ＋ｆ（ｘ,ｕ））＝Ｂ（ｘ,ｕ,Ｄｕ）在一定的条件下在Ｗ＾１．ｐ空间中的弱解的Ｈｏｌｄｅｒ连续性。     

一个四阶抛物方程整体弱解的正则性

本文研究一个四阶抛物方程的非负大初值混合Dirichlet-Neumann边值问题.使用半离散化解的精细熵估计与插值技巧,得到了正则性更好的整体弱解.     

REGULARITY OF WEAK SOLUTIONS TOQUASILINEAR ELLIPTIC OBSTACLE PROBLEMS

1Introduction*OurgoalinthisPaperistoinvestigatetheregUlarityofweaksolutionstothevariationalinequalityinvolvingHLaplacianoperator:'forallvintheconvelsetwhereho6W',P(Q)withho(2)2op(2)a.e.intheboundeddomainninReandueW',P(O)for1相似文献   

ON THE REGULARITY UP TO THE BOUNDARY OF SOLUTIONS OF ELLIPTIC BOUNDARY VALUE PROBLEMS

Abstract

We consider the regularity up to the boundary of solutions of those elliptic boundary value problems that can be treated by the non-variational theory developed by Schechter and others. The usual method of differential quotients is replaced by a method of Schappel [5] which is based on the properties of a Laplace-type operator 1-?2. In this paper the results of Schappel, which are given for boundary value problems in variational form, are extended to the non-variational case. We make important use of fractional order Sobolev spaces on the boundary and trace theorems.     

REGULARITY OF SOLUTIONS TO THE DIRICHLET PROBLEM FOR DEGENERATE ELLIPTIC EQUATION

In this paper, the author studies the regularity of Solutions to the Dirichlet problem for equation Lu = f, where L is a second order degenerate elliptic operator in divergence form in Ω, a bounded open subset of Rn (n ≥3).     

LOCAL REGULARITY RESULT FOR SOLUTIONS OF OBSTACLE PROBLEMS

This paper gives the local regularity result for solutions to obstacle problems of A-harmonic equation divA(x, ξu(x)) = 0, |A.(x,ξ)|≈|?|p-1, when 1 < p < n and the obstacle function (?)≥0.     

REGULARITY OF THE FREE BOUNDARY FOR SOME ELLIPTIC AND PARABOLIC PROBLEMS. I

We study the free boundary of solutions to some obstacle problems in the elliptic and parabolic cases. In the one-phase Stefan problem, the parabolic case, we prove that the points where the zero set has no density lie in a Lipschitz surface in space and time.

For some fully nonlinear elliptic equations of second order, we get similar results.

Furthermore, we prove the C ¹ regularity for singular points with some (n ? 1)-dimensional density.     

REGULARITY OF THE FREE BOUNDARY FOR SOME ELLIPTIC AND PARABOLIC PROBLEMS. II

In this paper we extend the results of the first one to solutions of some obstacle problem in the semilinear elliptic case that are used as a model for a gas problem. More precisely, we prove that the points of the free boundary, where the zero set has no density, lie in a Lipschitz surface. Furthermore, we get the C ¹ regularity for singular points with some (n ? 1)-density.

We also investigate the free boundary at points with density. We show that the set of these points is locally a C ¹ surface. This result is an extension of those achieved by Alt and Phillips [3] Alt, H. W. and Phillips, D. 1986. A free boundary problem for semilinearelliptic equations. J. Reine Angew. Math., 368: 63–107.  [Google Scholar], where it is used a concept stronger than the “density” applied here.     

一类二阶退化半线性椭圆型方程边值问题的适定性及解的正则性

本文考虑一类二阶退化半线性椭圆型方程边值问题.由椭圆正则化方法建立能量不等式,利用紧性推理,Banach-Saks定理,弱解与强解一致性,解常微分方程,椭圆型方程正则性定理,迭代方法,极值原理和Fredholm-Riesz-Schauder理论,可得相应线性问题适定性及解的高阶正则性;再由Moser引理和Banach不动点定理可得半线性问题解的存在性.这类问题与几何中无穷小等距形变刚性问题密切相关,其高阶正则性解的存在性对几何应用尤为重要.