2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79788Synchronization of chaotic system may occur only when the largest conditional Lyapunov exponent of the driven system is negative. The synchronization with positive conditional Lyapunov reported in a recent paper (Phys. Rev. E, {\bf 56}, 2272 (1997)) is a combined result of the contracting region of the system and the finite precision in computer simulations.6 pages, 7 figuresChaotic Dynamicstext