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Global phase portraits of planar piecewise linear refracting systems of saddle–saddle type
Nonlinear Analysis: Real World Applications, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yi Shao, Shimin Li, Kuilin Wu
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The Classification on the Global Phase Portraits of Two-dimensional Lotka–Volterra System
Journal of Dynamics and Differential Equations, 2008The authors present a complete classification of all quadratic planar Lotka-Volterra systems. By a very detailed investigation, they find 143 topologically inequivalent global phase portraits for these systems, up to time reversal. First, all systems with nontrivial closed orbits are examined separately.
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