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1.
1.G.M.Zaslavskyetc.[1]consideredamotionequationofchargedparticleinamagneticfieldwhichhasthefolowingform¨r=emE(x,t)+emc[r,B0],...  相似文献   

2.
EQUISTABILITY OF THE MATRIX DIFFERENTIAL EQUATIONS   总被引:5,自引:0,他引:5  
1IntroductionIn[1],theideasofageneralizedmatrixvaluednormandmatrixLyapunovfunctionshavebenproposedandthemaincompairsontheore...  相似文献   

3.
FortheNon-R.N.A.FDE,therearewideapplications[1].Theseequationsshowanimpartantcharacter,whichbothpositiveandnegativedelayactas...  相似文献   

4.
1IntroductionThepurposeofthispaperistoextendsomeoscilationresultsofthepapers[1,2]totheneutralhyperbolicdiferentialequationoft...  相似文献   

5.
§1 IntroductionAbasisofcubicpolynomialwasinroducedbyBallin1974[1,2].Twodifferentgeneral-izedBallbasesofhighdegreewerederivedbyWangandSaidin1987and1989indepen-dently[3~7].ThegeneralizedBallcurvespossessthesameshape-preservingpropertiesastheBe′ziercurv…  相似文献   

6.
ThispapergivesanewversionofatheoremofMitioNagumo[3],concerningthepositiveinvarianceofasetwithrespecttothediferentialequation(...  相似文献   

7.
§1.IntroductionandMainResultsThispaperisanextensionofthework[8].Weconsidertheexistenceofinfinitelymanyhomoclinicorbitsforthef...  相似文献   

8.
§1. IntroductionThecommonchemostatmodelhasbeenconsideredbymanymathematians(see[1]).Chemostatmodelsincorporatingdiscretetimedelayhavebeeninvestigatedin[2]and[3].In[4]and[5],chemostatmodelswithcontinuoustimedelayinnutrientrecyclingwereconsid-ered.Inthi…  相似文献   

9.
§1.IntroductionRecentlythetheoryofCsemigroupshasextensivelydevolopoedbymanyauthors(see[2-8,14]),butanaturalandimportantquest...  相似文献   

10.
SocaltheBerlinskitheoremforplanarquadraticSystem(QS)is:TheoremA[1]SupposethataQShas4finitecriticalpoints(CPs),Ifthequadrila...  相似文献   

11.
§1IntroductionMuchatentionhasbeendevotedtothenonlinearSchrodingerequations[1~3].Thisbe-causemanyphysicalphenomenacanbedescrib...  相似文献   

12.
1IntroductionTheinfinitesimalHilbert-16thproblem,posedbyV.I.Arnold[1],istogiveanestimateZ(m,n)ofthenumberofzerosofAbelianinte...  相似文献   

13.
田英培  徐扬 《数学季刊》1998,13(1):84-86
§1. IntroductionInordertoresearchthelogicalsystemwhosepropositionalvalueisgiveninalattice,XuY.[Xu2]proposedtheconceptoflatticeimplicationalgebraanddiscusseditssomeproper-tiesin[Xu1]and[Xu2].Also,in[XQ1],XuY.togetherwithK.Y.Qindiscussedtheprop-ertieso…  相似文献   

14.
Weconsiderthequadraticsystemoftype(I)m=0acordingtotheclasificationof[1].Withoutlosofgenerality,wemayasumethatthesystemistaken...  相似文献   

15.
闫宝强 《数学季刊》1998,13(1):55-60
§1. IntroductionItiswellknownthatthedegreetheoryforak-set-contractoperatorhasmanyapplicationsontheexistenceofthesolutionsofsomeequations(see[1],[2],[3]).However,someopera-torsarenotk-set-contractoperators.Itisanewproblemthatweestablishadegreetheoryfo…  相似文献   

16.
1IntroductionThesocaledVolterapradator-preymodelwithundercrowdingefect[1]isasystemintheformofx=ax(x-L)(k-x)-bxy,y=-cy+dxy-αy2...  相似文献   

17.
柏传志 《数学季刊》1998,13(3):23-28
§1. IntroductionSiddiqiandAnsari[4]developediterativealgorithmsforfindingapproximatesolutiontonewclassesofquasivariationalinequalitiesinHilbertspaces,HassouniandMoudafi[1]extendthemainideasofpaper[4]tomoregeneralcases,whichconsideredaclassofvariation…  相似文献   

18.
LetRbeaG-gradedringwithidentity1;thatisRg∈GRgandRgRhRghforallg,h∈G.TheassociativeringR#GdenotesthesmashproductforthegroupGandthegradedringR(see[3]or[4]).In[1],CohenandMontgomeryprovedthedualityTheoremsforactionsandcoactionsforfinitegroupG.In[2],af…  相似文献   

19.
1IntroductionInthispaper,westudyoperatorsgeneratedbyVoltera-Stieltjesintegrodiferentialexpresionsτoftheformτ[y](x)≡-ddv(x){y′...  相似文献   

20.
张昌斌  李岱 《数学季刊》1998,13(3):81-85
Thispaperiscontinuationsof[1],westilltousemarksandtermsin[1]andtheothertermsagreewith[2]and[3].LetEandFbetwoHausdorfftopologicalvectorspaces,XE,YFbetwononemptysets,FbethedualspaceofF,A:X→2YandB:Y→2Fbetwoset-valuedmapping,T:Y→Xbeinvertible.Inthisp…  相似文献   

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