Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
843646 | Nonlinear Analysis: Theory, Methods & Applications | 2007 | 13 Pages |
Abstract
The phase portrait of the second-order differential equation ẍ+∑l=0nfl(x)ẋl=0, is studied. Some results concerning existence, non-existence and uniqueness of limit cycles are presented. In particular, a generalization of the classical Massera uniqueness result is proved.
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Authors
Timoteo Carletti, Lilia Rosati, Gabriele Villari,