A Note on the Saddle Conic of Quadratic Planar Differential Systems
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We give some properties of the saddle conic of quadratic differential systems. We also deduce semi-algebraic conditions for the existence of one, two or three saddle points (in terms of affine invariants).
CitationBoularas, D. (2000). A note on the saddle conic of quadratic planar differential systems. Electronic Journal of Differential Equations, 2000(23), pp. 1-9.
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