ON AN EXTENSION OF THE 3-DIMENSIONAL TODA LATTICE Mircea Puta Key words: Toda lattice, Poisson manifolds, Lyapunov stability, energy-Casimir method, Lax representation. 1991 Math. Subject Classification: 58F05. Abstract: An extension of the 3-dimensional nonperiodic Toda lattice is proposed and some of its geometrical and dynamical properties are pointed out.