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时间:2019-05-13
《半有界非线性发展方程及其在KdV方程中的应用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、贵州大学硕士学位论文半有界非线性发展方程及其在KdV方程中的应用姓名:樊春霞申请学位级别:硕士专业:基础数学指导教师:项筱玲20001201£鼍≥娃q3、p阿界非线性发臌方程及其在KdV方程中的应用}商樊:本文得到半谢界非线性发展方稷觯的存在型一在庶用-h利用该结果,解的存在性条件比较窬舄验证,也可以得到解的楚精确结计。该结沦能够成功地解决KdV方穰勰的存在性及磴一’性。关键掌:存在毪,半育爨,密诲枣,Galerkin方程,KdV方程。中圈分类号:0175.2,0175.29,0175.91,Ol75.92Semib
2、ounde(1NonlinearEvohltionEquationswithApplicationtotheKdVEquations—FanChunxia(樊春霞)I)epartnmn£ofMathemal,icsGuizhouUMversil;yNovember30,2000AbrstractA11existenceresultofsolutionsforsemibounde(1nonlinearevohl—tionequationsiSpreseneed。Bythisresult,/filoreaccuratee
3、stimateOfsolutionscftnbeobtainedandconditionsofexistencearemoreeasilyvalidated.Olitresultsarcsiic(:essflfllyappliedtoproveexistenceandIItli{lltelleSSofSOlutionsforso/fileKdVequations.Kevwords:seIniboundcdness,admissibletriplet,Galerkinequa-tion,localLipschitzco
4、ntinuity,existence,uniqueness,KdVequat,ion.AMSSilt)jeetclassfieatilm35A20,35Q53,471110,46F10.11IntroductionEvolutionequationsplayimportantrolesinstudyingnonlinearpartial(tiflirenl;ialequationswhichcandescribemanynaturalandsocialphenomena+Inthispaper,wefirstlyst
5、udyexistenceofsolutionsforthesemiboandednordinearevolutionequationm’(t)=一(z(t),t)forallt∈【0,T】m(0):==:.T0,(1.1)where06、—theKorteweg-devrj(!setluatiousfsimplyforKdVequationsl.TheKdVequationwasderivedbyKorteweganddeViiesin1895asamodelforpropagationofsomesurfacewaterwavesalongachancell{see{4疆Formorethanonehundredyears}theKdvequationhasbeenalwaysbeiuganimportantnonlinearmodelassoci7、或edwiththescienceofsolids,liquidsandgases.Since1960s,theKdVequationhasbeenstudiedfromvariousaspectsofbothmathematicsandphysics(see【5】).ManymethodswcredevelopedtoseekthesolutionoftheKdVequationsuchasthemethodsofsolitonsee【9】),inversescatteringmethod(see16]),grou8、ptheory(see9、710、),semigrouptheory(see1811、),etc.Particularly,KateandLaiintroducedasemiboundednonlinearoperatortostudytheKdVequationwith{nitialvalue饥+裂翟之苗_0联引刈(12)u(z0,)=“o《∥、⋯7(
6、—theKorteweg-devrj(!setluatiousfsimplyforKdVequationsl.TheKdVequationwasderivedbyKorteweganddeViiesin1895asamodelforpropagationofsomesurfacewaterwavesalongachancell{see{4疆Formorethanonehundredyears}theKdvequationhasbeenalwaysbeiuganimportantnonlinearmodelassoci
7、或edwiththescienceofsolids,liquidsandgases.Since1960s,theKdVequationhasbeenstudiedfromvariousaspectsofbothmathematicsandphysics(see【5】).ManymethodswcredevelopedtoseekthesolutionoftheKdVequationsuchasthemethodsofsolitonsee【9】),inversescatteringmethod(see16]),grou
8、ptheory(see
9、7
10、),semigrouptheory(see18
11、),etc.Particularly,KateandLaiintroducedasemiboundednonlinearoperatortostudytheKdVequationwith{nitialvalue饥+裂翟之苗_0联引刈(12)u(z0,)=“o《∥、⋯7(
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