| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 841489 | Nonlinear Analysis: Theory, Methods & Applications | 2011 | 8 Pages |
Abstract
We present sufficient and necessary conditions for the permanence of discrete systems in the plane based on an index of fixed points on convex sets. In concrete models, a simple picture is sufficient to deduce whether our system is permanent or not.
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Authors
Alfonso Ruiz-Herrera,