@article { author = {}, title = {SOME BOUNDARY VALUE PROBLEMS FOR A NON-LINEAR THIRD ORDER O.D.E.}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {11}, number = {2}, pages = {-}, year = {2000}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {Existence of periodic solutions for non-linear third order autonomous differential equation (O.D.E.) has not been investigated to as large an extent as non-linear second order. The popular Poincare-Bendixon theorem applicable to second order equation is not valid for third order equation (see [3]). This conclusion opens a way for further investigation.}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31859.html}, eprint = {https://jsciences.ut.ac.ir/article_31859_75d45959e29723fc6e83a86bbaf9c9ab.pdf} }