Integrable Weak Saddles for Trigonometric Liénard Systems

Springer Science and Business Media LLC - Tập 26 - Trang 551-556 - 2019
Claudia Valls1
1Departamento de Matemática, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal

Tóm tắt

We give a complete algebraic characterization of the integrable weak saddles for planar trigonometric Liénard systems. The main tools used in our proof are the classification of the weak saddles on planar analytic Liénard systems and the characterization of some subfields of the quotient field of the ring of trigonometric polynomials.

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Springer Science and Business Media LLC

Tập 26

551-556

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