简介:这篇论文的目的是在3-dimensional上在equivariant操作之中学习关系小的封面。作者为这些操作得到三个公式。作为应用,在面向的3-dimensional的构造的Nishimura鈥檚定理在所有3-dimensional的构造的小封面和L眉-于鈥檚定理小封面被改进。而且为3-dimensional2花托manifolds的构造,它被看那,所有操作能被使用equivariant手术获得。关键词Equivariant外科-有限的组行动-小盖子-3-dimensional歧管-3-dimensional简单polytope2000苏布杰克特先生分类57M50-57M60-57S17-52B10工程由复旦大学支持了,通过朝鲜(NRF)的国家研究基金会的Fujyukai基金会和基本科学研究节目由教育部资助了,科技(号码2009-0063179)。
简介:这份报纸给有限维的无法缩减的操作员的概念((FDI)操作员)并且无限的维的无法缩减的操作员((IDI)操作员)。讨论关系(FDI)操作员,(IDI)操作员和强烈无法缩减的操作员((SI)操作员)并且说明操作员的三个班的一些性质。为有上面的三角形的操作员矩阵的形式的操作员的有限维的irreducibility的一些足够的条件被给。这份报纸证明有一个单条系列的每个操作符是小紧缩的不安一(FDI)在每围住的线性操作符T能被操作符接近在的可分离的Banach空格和表演(FDI)的操作员关于强壮操作员的拓扑学和每个紧缩的操作符K罐头的(X)由操作符接近了在(FDI)关于有一个Schauder基础的Banach空格X上的标准拓扑学的(X),在此(FDI)(X):={TB(X):T=i=1kTi,Ti(FDI),k}。
简介:
简介:Inridspaperamixedfiniteelementmethodfortheconvection-dominateddiffusionproblemswithsmallparameterεispresented,theeffectoftheparameterεontheapproximationerrorisconsideredandasufficientconditionforoptimalerrorestimatesisderived.Thepaperalsoshowsthatundersomeconditions,thestandardfinitedementmethodonlygivesahoundedsolution,howeverthemixedfiniteelementmethodgivesaconvergentone.
简介:ThefollowingcoupledSchrdingersystemwithasmallperturbationuxx+u-u3+βuv2+f(,u,ux,v,vx)=0inR,vxx-v+v3+βu2v+g(,u,ux,v,vx)=0inRisconsidered,whereβandaresmallparameters.ThewholesystemhasaperiodicsolutionwiththeaidofaFourierseriesexpansiontechnique,anditsdominantsystemhasaheteroclinicsolution.Thenadjustingsomeappropriateconstantsandapplyingthefixedpointtheoremandtheperturbationmethodyieldthatthisheteroclinicsolutiondeformstoaheteroclinicsolutionexponentiallyapproachingtheobtainedperiodicsolution(calledthegeneralizedheteroclinicsolutionthereafter).
简介:1.IntroductionThetwcawayerrorcomponentregressionmodelmsybeexpressedasif=o+
简介:Westudytheleastsquaresestimationofdriftparametersforaclassofstochasticdifferentialequationsdrivenbysmallα-stablenoises,observedatnregularlyspacedtimepointsti=i/n,i=1,···,non[0,1].Undersomeregularityconditions,weobtaintheconsistencyandtherateofconvergenceoftheleastsquaresestimator(LSE)whenasmalldispersionparameterε→0andn→∞simultaneously.TheasymptoticdistributionoftheLSEinoursettingisshowntobestable,whichiscompletelydifferentfromtheclassicalcaseswhereasymptoticdistributionsarenormal.
简介:Inthispaper,weconsiderasystemoftwocubicquasi-linearKlein-Gordonequationswithdifferentmassesforsmall,smooth,compactlysupportedCauchydatainonespacedimension.Weshowthatsuchasystemhasglobalexistencewhenthenonlinearitiessatisfyaconvenientnullcondition.OurresultsextendtheglobalexistenceprovedbySunagawarecentlyunderthenon-resonanceassumptiontothatundertheresonanceassumption.
简介:<正>Foranyintegersa1,a2,a3,a4andcwitha1a2a3a40(modp),thispapershowsthatthereexistsasolutionX=(x1,x2,x3,x4)∈Z4ofthecongruencea1x12+a2x22+a3x32+a4x42≡c(modp)suchthat‖X‖=max{|x1|,|x2|,|x3|,|x4|}《p1/2logp.