共查询到20条相似文献,搜索用时 10 毫秒
1.
杨芬 《数学物理学报(B辑英文版)》2012,(6):2377-2387
The existence and uniqueness of singular solutions decaying like r m(see(1.4)) of the equation u + k i=1 ci|x|li upi = 0,x ∈ Rn(0.1) are obtained,where n ≥ 3,ci > 0,li > 2,i = 1,2,...,k,pi > 1,i = 1,2,...,k and the separation structure of singular solutions decaying like r(n 2) of eq.(0.1) are discussed.moreover,we obtain the explicit critical exponent ps(l)(see(1.9)). 相似文献
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讨论如下的半线性方程:{-△u=g(│x│)f(u) inΩ u=0 onδΩ这里Ω={x∈R^N:R〈│x│〈R} N≥2,0〈R〈R〈+∞,在适当的条件下,运用变分方法我们得到了该方程存在两个非平凡径向正解。 相似文献
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研究如下N维奇异半线性椭圆方程△u+f(x,u)=0, x∈RN(N≥3),其中函数f:RN× R+→R+连续,在u=0有奇异性;采用上-下解方法给出该方程具有满足如下性质的有界正整体解u的条件: u∈C2+θloc(RN)使得lim |x|→∞ u(x)=0且u(x)≥εmin{1,|x|2-N},其中ε>0是常数;并证明:若条件添加"f关于u单调不增"的限制,则这种解是唯一的. 相似文献
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EXISTENCE AND UNIQUENESS OF POSITIVE SOLUTIONS TO A CLASS OF SEMILINEAR ELLIPTIC SYSTEMS 总被引:3,自引:0,他引:3
In this paper an existence and uniqueness theorem of positive solutions to a class of semilinear elliptic systems is proved. Also, a necessary condition for the existence of the positive solution is obtained. As the application of the main theorem, two examples are given. 相似文献
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唐春雷 《数学物理学报(B辑英文版)》1999,19(3):289-292
1991MRSubjectClassification35C15,58E50ConsiderthesernilinearellipticdifferentialequationInthestudyofllollliliearSchrodingerequations,nonlinearequationsofKleili~Gordolltypeall(1reaction-diffusiollequatiolls,sollltionsof(1)correspolldtostalldingwavesolutions.stroll(lill~(ortraveling)wavesolutionsandsteadystatesofthesystem.Manypapersdealtwiththeautonomouscasewhere5andfareindependentofatorwiththeradiallysynlluetriccasewherebandfdependonfi](see[1-4]andtheirreferences).Recentlytheperiodiccaseand… 相似文献
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带Robin边值条件的半线性奇异椭圆方程正解的存在性 总被引:2,自引:1,他引:1
本文研究了一类带Robin边值条件的半线性奇异椭圆方程.通过Hardy不等式,山路引理以及选取适当的试验函数验证局部PS条件,得到了此类方程正解的存在性这一结果. 相似文献
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Hui Feng 《计算数学(英文版)》1998,(5)
1.IntroductionLetfi=(0,l),f(x)eL'(fl),"o(x)EH'(fl)nHI(fl),op(u)=u',weconsiderthefollowinginitial-boundaryvalueproblem:Bytheusualapproach[1--4]wecangettheglobalexistenceofthesolutionof(1.1),furthermore,thesolutionof(l.l)convergestothesolutionofthefollowingstationaryproblem(1.2)ast-co.l)Th.ProjectissupportedbyChinaPostdoctoralFoundationandScienceFOundationofChinaAcademyofEngineeringPhysics.Inthispaperweprovethatthesolutionofimplicitdifferenceschemefor(1.1)convergestothesolutionofdifferenc… 相似文献
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1.APrioriBounds##DTherearealotofresultsfortheprioriboundsandtheexistenceofpositivesolutionsofsemilinearellipticequations(see[2],[3]).Weshallinvestigatetheprioriboundsandtheexistenceofpositivesolutionsforsystemofellipticboundaryvalueproblems:Wealwaysassume… 相似文献
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In this paper, the authors study the existence and nonexistence of multiple positive solutions for problem(*)μwhere h ∈ H-1(RN), N ≥ 3, |f(x,u)| ≤ C1up-1 + C2u with C1 > 0, C2∈ [0,1) being some constants and 2 < p < ∞. Under some assumptions on f and h, they prove that there exists a positive constant μ* <∞ such that problem (*)μ has at least one positive solution uμ if μ,∈ (0,μ*), there are no solutions for (*)μ if μ, > μ* and uμ is increasing with respect to μ∈ (0,μ*); furthermore, problem (*)μ has at least two positive solution for μ ∈ (0,μ*) and a unique positive solution for μ, =μ* if p ≤2N/N-2. 相似文献
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Zhang Hui Guo Zongm ing Dept. ofMath. Henan Norm alUniv. Xinxiang . Institute ofSystem s Science Academ ia Sinica Beijing . 《高校应用数学学报(英文版)》1999,(3)
§1 IntroductionInthispaperwecontinuetoconsidertheexistenceofpositiveradialsolutionsforthequasilinearellipticequation-div(|Du|p-2Du)=f(u) inΩ,(1)u(x)=0 onΩ,wherex∈Rn,n≥2,Ω={x:a<|x|<b,a,b>0},andp>1,f∈C1((0,∞))∩C0([0,∞))satisfyingthefollowinghypotheses… 相似文献
15.
何跃 《数学年刊A辑(中文版)》2004,(2)
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. 相似文献
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Xu Youjun 《Annals of Differential Equations》2006,22(4):596-601
In this paper, we consider the existence of positive solutions of the semlinear elliptic boundary value problem with convex and concave nonlinearities, the results obtained improve and generalize some known results. 相似文献
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61. IntroductionConsider the semilinear elliptic problemwhere p E (1, ac) for N 2 3, and p E (l, co) for N = 1, 2, 0 S a(x) E C(R"), A > 0 is areal parameter.The existence and uniqueness of solution for such problems have been considered by mailyauthors recently (see [l--4] and references therein). In I3], T. Bartsch and Wang, Z. Q. provedthat with more genaral nolilineaxities (1.1) has at least one solution for A large under someconditions on a(x), one of which is that a--1 (0) has non… 相似文献
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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对应的边值问题广义解的存在唯一性及其渐近性态. 相似文献
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In this paper we extend the idea of interpolated coefficients for a semilinear problem to the triangular finite volume element method. We first introduce triangular finite volume element method with interpolated coefficients for a boundary value problem of semilinear elliptic equation. We then derive convergence estimate in Hi-norm, L2-norm and L∞-norm, respectively. Finally an example is given to illustrate the effectiveness of the proposed method. 相似文献
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In this paper, we are concerned with a weighted quasilinear elliptic equation involving critical Hardy–Sobolev exponent in a bounded G-symmetric domain. By using the symmetric criticality principle of Palais and variational method, we establish several existence and multiplicity results of positive G-symmetric solutions under certain appropriate hypotheses on the potential and the nonlinearity. 相似文献