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Publication:3351714
zbMath0728.34030MaRDI QIDQ3351714
Publication date: 1989
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Liénard systemquadratic systemuniqueness of limit cyclestransformation of coordinatesZhang's uniqueness theorem
Topological structure of integral curves, singular points, limit cycles of ordinary differential equations (34C05) Transformation and reduction of ordinary differential equations and systems, normal forms (34C20)
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