| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 844133 | Nonlinear Analysis: Theory, Methods & Applications | 2008 | 10 Pages |
Abstract
In this paper, we study the problem of whether all trajectories of the Liénard system ẋ=y−F(x) and ẏ=−g(x) cross the vertical isocline, which is very important for the existence of periodic solutions and oscillation theory. We solve this problem completely in some sense. Our results include a proof for an old conjecture of Hara and Sugie.
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Authors
A. Aghajani, A. Moradifam,