Llibre, JaumeLopes, Bruno D.De Moraes, Jaime R. [UNESP]2014-12-032014-12-032014-04-01Qualitative Theory Of Dynamical Systems. Basel: Springer Basel Ag, v. 13, n. 1, p. 129-148, 2014.1575-5460http://hdl.handle.net/11449/112912We study the maximum number of limit cycles that bifurcate from the periodic solutions of the family of isochronous cubic polynomial centers(x) over dot = y(-1 + 2 alpha x + 2 beta x(2)), (y) over dot = x + alpha(y(2) - x(2)) + 2 beta xy(2), alpha is an element of R, beta < 0,when it is perturbed inside the classes of all continuous and discontinuous cubic polynomial differential systems with two zones of discontinuity separated by a straight line. We obtain that this number is 3 for the perturbed continuous systems and at least 12 for the discontinuous ones using the averaging method of first order.129-148engPolynomial vector fieldLimit cycleAveraging methodPeriodic orbitIsochronous centerArtigo10.1007/s12346-014-0109-9WOS:000334414100007Acesso restrito