摘 要: | ·DePartment of Mathematies·On Bifuroation Curvoo of Sy。七em(E盆)Having Sy二二o七ry Cen七r。, Saddlo Poin七吕and Fino Foeu吕e3 D。呵Y椒落MaZ从‘肌Wa呵E娜俪介·················……1(47)The Smoo七加。吕3 of tho Solu七ion of Soeond Ordor Difforen七ial Equa毛ion with Nonnogativo Cha抓。七。过。tio。 Y‘Fa而哪“么··~···························································……7(109)The Struoturo and ExPlio…
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