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Date: 2012-04-19 17:05:26Mathematics Quadratic forms Elementary algebra Differential equation Ordinary differential equations Polynomials | Limit Cycles of Quadratic Systems with a Perturbed Weak Focus of Third Order and Saddle Equilibrium at InfinityAdd to Reading ListSource URL: www.math.spbu.ruDownload Document from Source WebsiteFile Size: 111,39 KBShare Document on Facebook |