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298 个结果
  • 简介:<正>Inthispaper,weapplythesolitontheorytothecaseofisometricimmersionindifferentialgeometryandobtainafamilyofisometricimmersionsfromMn1(c1)×Mn2(c2)tospaceformsMn(c)byintroducing2-parameterloopalgebra.

  • 标签: SOLITON THEORY ISOMETRIC immersion Riemaniann product
  • 简介:1.IntroductionLetRbethecollectionofallrealnumbers,andZthecollectionofallintegers.Iff1(x)andf2(x)aretwofunctionsinL2(R),theinnerproduct1,f2>isgivenbyWesayf1(x)andf2(x)arebiorthogonal,ifFirstletusdescribeaclassoffunctions(x)and(2)inL2(R)asfollows.Thr...

  • 标签: Biorthogonality
  • 简介:InthispaperitturnsoutthataBanachlatticeXisorderisomorphictol~1(Γ)forsomenonemptysetΓiffitisaSchurspaceandalltheinfinitelydimensional,separableandclosedidealsofXareorderisomorphic.

  • 标签: ISOMORPHIC nonempty INFINITELY SEPARABLE proof TURNS
  • 简介:设E是任意实Banach空间,T:E→E是Lipschitz的强增生算子.证明了,带误差的Ishikawa迭代序列强收敛到方程Tx=f的唯一解.特别地,还给出了Ishikawa迭代序列的收敛率估计.另一方面,一个相关结果,讨论了E中lipschitz强伪压缩映象的不动点的带误差的Ishikawa迭代序列的收敛.

  • 标签: 实BANACH空间 Lipschitz强增生算子 Ishikawa逼近
  • 简介:ThispapershowsthattheC1-curvedfiniteelementdevelopedbyBernadoningeneralcannotsatisfytheessentialboundaryconditionsonapproximateboundary.Furthermore,amodifiedC1-curvedfiniteelementisgiven,whichiscompatiblewiththeelementofArgyristriangleandcansatisfythehomogeneousDirichletboundaryconditionsonapproximateboundary.

  • 标签: Curved boundary DOMAIN Argyris TRIANGLES C1-curved
  • 简介:Letf(x)∈C[-1,1],pn*(x)bethebestapproximationpolynomialofdegreentof(x).G.Iorentzconjecturedthatifforalln,p2n*(x)=p2n+1*(x),thenfiseven;andifp2n+1*(x)=p2n+2*(x),po*(z)=0,thenfisodd.Inthispaper,itisprovedthat,undertheL1-norm,theLorentzconjectureisvalidconditionally,i.e.if(i)(1-x2)f(x)canbeextendedtoanabsolutelyconvergentTehebyshevsories;(ii)foreveryn,f(x)-p2n+1*(x)hasexactly2n+2zeros(or,inthearcondsituation,f(x)-p2n+2*(x)hasexaetly2n+3zeros),thenLorentzconjectureisvalid.

  • 标签: LORENTZ absolutely CONJECTURE polynomial EXACTLY 二忍
  • 简介:A.simplicialmesh(triangulation)isconstructedthatgeneralizesthetwo-dimensional4-directionmeshtoR~m.Thismesh,withsymmetric,shift-invariantvaluesatthevertices,isshowntoadmitaboundedC~1interpolantifandonlyifthealternatingsumofthevaluesattheverticesofany1-cubeiszero.Thisim-pliesthaiinterpolationattheverticesofanm-dimensional,simplicialmeshbyaC~1piecewisepolynomialofdegreem+1withonepiecepersimplexisunstable.

  • 标签: invariant INTERPOLATION TRIANGULATION PIECEWISE symmetric cube
  • 简介:SupposethatwewanttoapproximatefC[0,1]bypolynomialsinPn,usingonlyitsvaluesonXn={i/n,0≤i≤n}.ThiscanbedonebytheLagrangeinterpolantLnfortheclassicalBernsteinpolynomialBnf.But,whenntendstoinfinity,LnfdoesnotconvergetofingeneralandtheconvergenceofBnftofisveryslow.WedefineafamilyofoperatorsBkn,n≥k,whichareintermediateonesbetweenB(0)n=B1n=BnandBnn=Ln,andwestudysomeoftheirproperties.Inparticular,weproveaVoronovskaja-typetheoremwhichassertsthatBknf-f=0(n-[(k+2)/2)forfsufficientlyregular.Moreover,B(k)nfusesonlyvaluesofBnfanditsderivatiesandcanbecomputedbyDeCasteljauorsubdivisionalgorithms.

  • 标签: INFINITY APPROXIMATE sufficiently POLYNOMIAL converge operators
  • 简介:,α-PARTIALREGULARITYFORNONLINEARELLIPTICSYSTEMSTanzhong(DepartmentofMathematics,XiamenUniversity,Xianmen361005,China.)Ab?..

  • 标签: nonlinear ELLIPTIC systems CONTROLLABLE GROWTH CONDITION
  • 简介:Inthispaperwehavestudiedn-persongameproblemsof(0,1)normalizationandcomposition.Alsowehaveconcernedmultilinearextensionsofcompositiongamesandespecialgames[5-7,9-14].AswehavestudiedShapleyvalue[1-4,15],wewillgivesomeproofsofthetheorems.

  • 标签: 复合博奕 标准化博奕 SHAPLEY值 多线性扩展