MPEJ Volume 9, No. 2, 6 pp. Received: Jan 3, 2003. Revised: Mar 6, 2003. Accepted: Apr 22, 2003. M.Iadh Ayari, Sahbi Ayari An explicit separate solution for the Tzitzeica equation ABSTRACT: In this note we present an explicit solution of the Tzitz\'eica equation in terms of the $P$-Weierstrass function, representing non-scattering double waves. This solution is obtained by combining a ``nonclassical'' method and certain separation of variables technique.