简介：ThispapersolvesanopenproblemofVaserstein.Themainresultis:theequationx^m+y^m=z^mhasasolutioninSL2zifandonlyifmisnotdivisibleby4or6andmisnotcongruentto3modulo6.

简介：Inthispaper,wehaveinvestigatedtheproblemoftheconvergencerateofthemultipleintegralwheref∈Cn+1([0,T]n)isagivenfunction,πisapartitionoftheinterval[0,T]and{BtHi,π}isafamilyofinterpolationapproximationoffractionalBrownianmotionBtHwithHurstparameterH<1/2.ThelimitprocessisthemultipleStratonovichintegralofthefunctionf.Inviewofknownresults,theconvergencerateisdifferentfordifferentmultiplicityn.Undersomemildconditions,weobtainthattheuniformconvergencerateis2Hinthemeansquaresense,whereisthenormofthepartitiongeneratingtheapproximations.

简介：一张图的一个顶点被说统治它的邻居的本身和所有。图G的一个双统治集合是G的顶点的集合D，以便G的每个顶点被D的至少二个顶点统治。图G的双支配数字是G的一个双统治集合的最小的集的势。为图G=(V，E)，如果V(G)\D的每个顶点在D有至少二位邻居，子集DV(G)是一个2-dominating集合，当如果，统治G的集合是2-outer-independent的时另外集合V(G)\D是独立的。G的2-outer-independent支配数字是统治G的集合的2-outer-independent的最小的集的势。这份报纸加一个与双支配数字平等者描绘所有树到2-outer-independent支配数字。

简介：高考题（2012年江苏卷第20（2）题）已知各项均为正数的两个数列{an}和{bn}满足an＋1=an＋bn/√an^2＋bn^2,n∈N^＊.

简介：Letuk(2,r)bealittleq-Schuralgebraoverk,wherekisafieldcontaininganl-thprimitiverootεof1withl≥4even,theauthorconstructsacertainmonomialbaseforlittleq-Schuralgebrauk(2,r).

简介：研究了两步保费率下Erlang（2）风险过程,给出了Gerber-Shiu折现罚函数的相关结果：即给出了罚金函数的两个微积分方程及其解或更新方程.在索赔额为指数分布条件下得到了两个与破产相关的量并计算出了相应的数值结果.

简介：WedescribetheestablishingprocessfortheBoson-FermionalgebraofOSP(1,2)startingfromthefundamentalWigneroperatorsofOSP(1,2),andstudyitsstructuréfeatureandrepresentationtheory.WealsogivetheBoson-FermionrepresentationofOSP(1,2),whichisaninfinitedimensionalandgradestarrepresentation

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简介：WeconsiderthebifurcationofsingularpointsnearadoublefoldpointinZ2-symmetricnonlinearequationswithtwoparameters,wherethelinearizationhasatwodimensionalnullspacespannedbyasymmetricnullvectorandanami-symmetricnullvector.Inparticular,weshowtheexistenceofaturningpointpathandapitchforkpointpathpassingihroughthedoublefoldpointandtheyaretheonlysingularpointsnearby.Theirnondegeneracyisconfirmed.Asupportingnumericalexampleisalsoprovided.Themaintoolsforouranalysisaswellasthecompulationaresomeextendedsystems.

简介：TheauthorsdiscussproblemsofapproximationtofunctionsinL^2(R^n)andoperatorsfromL^2(R^n1)toL^2(R^n2)byRadial-BasisFunctions.TheresultsobtainedsolvetheparblemofcapabilityofRBFneuralnetworks,abasicprobleminneuralnetworks.

简介：本文给出任意有限维全微分方程的判定定理与求通解的一种方法。定理的条件是充要的。判断与求通解是同步进行的,方法简单,运用方便。解决了高维全微分方程的判断与求通解的困难。

简介：本文给出了２－连通图有Ｈａｍｉｌｔｏｎ圈的又一个充分条件．定理设Ｇ为有ｎ（ｎ＞３）个顶点的２－连通图，如果对Ｇ中任意两个顶点ｕ、ｖ，当ｄ（ｕ，ｖ）＝２时，都有ｍａｘ（ｄ（ｕ），ｄ（ｖ））≥ｎ／２，则Ｇ有Ｈａｍｉｌｔｏｎ圈．证用反证法．假设Ｇ没有Ｈａｍ...

简介：ThepaperdealswiththecomputationandbifurcationanalysisofdoubleTakens-Bogdanovpoint(u0,∧0)(inshort,DTBpoint)intheZ2-equivariablenonlinearequationf(u,∧)=0,f:U×R4→V,whereUandVareBanachspaces,parameters∧∈R4.At(u0,∧0),thenullspaceoffu0hasgeometricmultiplicity2andalgebraicmultiplicity4.FirstlyaregularextendedsystemforcomputingDTBpointisproposed.Secondly,itisprovedthattherearefourbranchesofsingularpointsbifurcatedfromDTBpoint:twopathsofSTBpoints,twopathsofTB-Hopfpoints.Finally,thenumericalresultsofonedimensionalBrusselatorequationsaregiventoshowtheeffectivenessofourtheoryandmethod.

简介：刻画加权Bergman空间Aα^2（Ω）上的加权复合算子Cφ,Ф的Schatten-p类．

简介：证明了图2Kv的可旋转(4,6)圈系存在的充分必要条件为:v≥10,v≡0,5(mod10).更多还原

简介：Inthispaper,themodifiedextendedtanhmethodisusedtoconstructmoregeneralexactsolutionsofa(2+1)-dimensionalnonlinearSchr¨odingerequation.WiththeaidofMapleandMatlabsoftware,weobtainexactexplicitkinkwavesolutions,peakonwavesolutions,periodicwavesolutionsandtheir3Dimages.

简介：研究二次矩阵方程X2-bX-C=O（b〉0,C为n×n阶正定阵）的正定解,证明了解的存在唯一性并且给出了求解方法.

简介：Inthispapertheauthorpresentsamethodforthenumericalsolutionofa2-DCauchyprincipalvalueoftheformwhereSisadomainwithacontinuousboundary.Byusmgpolarcoordinates,theintegralisreducedtotheformwheredenotesthefinite-partoftheintegral.Weconstructtherelativeproductrulebasedonquasi-interpolatingsplines.Convergenceresultsareprovedandnumericalexamplesaregiven.

简介：设G是一个2—(v，11，1)设计的可解区传递但非旗传递自同构群，且G点一本原则，则v=p^n，G≤AГL(1，p^n)且p≠2。