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1.
YANG Xuefeng 《系统科学与复杂性》1992,(3)
In this paper,we study the existence and regularity of G-equivariantharmonic maps between surfaces with a finite group G(?)O(3)action.We discoverthat the energy level of compactness in the G-equivariant perturbed problems ishigher than that in general case.This implies the multiplicity of harmonic mapsfor some examples. 相似文献
2.
LI Wen 《系统科学与复杂性》1997,(2)
1.IntroductionConsideringthefollowingsystemoflinearequationsAx~b(l.1)whereAisannxnM-matrix,bisanndimensionalvectorandbeRang(A).Theresearchonthesolutionofequation(1.1)isveryimportantinLeontiefmodelofinput-outputanalysis(see[1,2]).G.St..k.ma[Zjstudiestheabo… 相似文献
3.
ZHOU Jin 《系统科学与复杂性》1999,(2)
1.IntroductionConsiderthefollowinggeneralizedLi6nardtypeequationwhereshallowing[1],thisequationwillbecalledasaLi6nard-typeequationofordern.Whenn=1,theequation(1.1)canbewrittenasthefollowingformClearly)whenfi(x)=j(x),f200=0,theequation(1.3)isreducedtothewellknownLi6nardequationx j(x)x g(x)=0.(1.4)Recently,theequation(1.3)hasalreadybeenstudiedwithparticularemphasisontheex-istenceanduniquenessofperiodicsolutionsbyseveralauthors.Forexample,needmanandKuangll],GuidorizzilZ],ZhouJinI3],andJiangJ… 相似文献