摘 要: | 1.IntroductionConsiderthefollowingtwo-parameterdependentnonlinearproblemwhereX=Re,^,parerealpaxameters,fEC"(r23),D.fo(=D.f(xo,^o,Po))isanedholmmapwithindexzero.Oneofourmainassumptions,whichariseinmanyapplications1'2,5--7],isthatfsatisfiesZZ--symmetry:the…
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