Abstract
We show that the existence of a cubic polynomial systems having three real invariant straight lines forming a triangle with at least one limit cycle in the interior.
Citation
Zhenhai Liu. E. S ´aez. I. Sz´ant ´o. "A CUBIC SYSTEM WITH AN INVARIANT TRIANGLE SURROUNDING AT LEAST ONE LIMIT CYCLE." Taiwanese J. Math. 7 (2) 275 - 281, 2003. https://doi.org/10.11650/twjm/1500575064
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