The study of isochronicity and critical period bifurcations on center manifolds of 3-dim polynomial systems using computer algebraMencinger, Matej (Avtor) Ferčec, Brigita (Avtor) polynomial systems of ODEscenter manifoldsisochronicitybifurcation of critical periodsCASUsing the solution of the center-focus problem from [4], we present the investigation of isochronicity and critical period bifurcations of two families of cubic 3-dim systems of ODEs. Both cubic systems have a center manifold filled with closed trajectories. The presented study is performed using computer algebra systems Mathematica and Singular.20132015-07-10 12:10:59Delo ni kategorizirano49455sl