School of Mathematical & Statistical Sciences Faculty Publications

Dynamical behaviors of a van der Pol-Duffing oscillator with indefinite degree

Document Type

Article

Publication Date

2026

Abstract

In this paper, we study a van der Pol-Duffing oscillator with indefinite degree in the Poincaré disc. Some fascinating and rich dynamics are presented, including abundant nonlinear phenomena such as limit cycles, figure-eight loops, and saddle connections, thereby providing the complete global structure.

Publication Title

Communications on Pure and Applied Analysis

DOI

10.3934/cpaa.2026027

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