PERIODIC SOLUTIONS OF CERTAIN THREE DIMENSIONAL AUTONOMOUS SYSTEMS | ||
| Journal of Sciences, Islamic Republic of Iran | ||
| مقاله 7، دوره 10، شماره 2، 1999 اصل مقاله (245.73 K) | ||
| چکیده | ||
| There has been extensive work on the existence of periodic solutions for nonlinear second order autonomous differantial equations, but little work regarding the third order problems. The popular Poincare-Bendixon theorem applies well to the former but not the latter (see [2] and [3]). We give a necessary condition for the existence of periodic solutions for the third order autonomous systems, This may become useful in further investigations. Our claims are proved and supported by certain examples. | ||
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