Browsing Acta Polytechnica. 2013, vol. 53, no. 3 by Author "Himmel , Martin"
Author: Himmel , Martin
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)The Dulac criterion is a classical method for ruling out the existence of periodic solutions in planar differential equations. In this paper the applicability and therefore reversibility of this criterionis under consideration.