简介:ALeverrier-likealgorithmispresentedwhichallowsthecomputationofthetransferfunctionofalinearregularsystemfromitsm-Dstate-spacedescription,withoutinvertingamultivariablepolynomialmatrix.ThisalgorithmisanextensionoftheclassicLeverrier'salgorithmfor1-Dsystemanditreducesthecomputationalcost.ra-DCayley-Hamiltontheoremisalsoshownbythealgorithm.
简介:Ekeland’svariationalprincipleisafundamentaltheoreminnonconvesanalysis.Itsgeneralstatementisasthefollowing:Ekeland’sVariationalPrinciple'’a:.LetVbeacompletemetricspace,andF:F—*-RU{+°°}alowersemicontinuousfunction,notidentically+00andboundedfrom,below.Lets>0begiven,andapointu^VsuchthatF(u)
简介:Inthisarticle,westudytheexplicitexpressionsoftheconstantsintheerrorestimateofthenonconformingfiniteelementmethod.WeexplicitlyobtaintheapproximationerrorestimateandtheconsistencyerrorestimatefortheWilson'selementwithouttheregularassumption,respectively,whichimpliesthefinalfiniteelementerrorestimate.Suchexplicitapriorierrorestimatescanbeusedascomputableerrorbounds.
简介:ThispaperdealswiththeexistenceandmultiplicityofperiodicsolutionsofDuffingequationsx+g(x)=p(t),TheauthorprovesaninfinityofperiodicsolutionstotheperiodicallyforcednonlinearDuffingequationsprovidedthatg(z)satisfiesthegloballylipschitzianconditionandthetime-mappingsatisfiestheweakeroscillatingproperty.
简介:Let{Xn,n≥1}beasequenceofα-stablerandomvariables(0
简介:在这份报纸,我们学习(伪,分级的旗帜弯曲在上的尾)度量标准一歧管尺寸n的M(n鈮?3)。建议那一(伪,尾)度量标准F不是Randers类型的一个Finsler度量标准,也就是说F鈮吗?+k3尾k1>0,k2并且k3是M上的分级的功能。如果并且仅当,我们证明F具有分级的旗帜弯曲并且消失的S弯曲旗帜弯曲K=0并且F是一个Berwald度量标准。在这种情况中,F是一局部地Minkowski度量标准。关键词Finsler度量标准-(伪,尾)度量标准-旗帜弯曲-S弯曲-Minkowski公制的先生(2000)题目分类53B40-53C60由中国(资助号码10971239)的国家自然科学基础支持了