A. G. Meshkov
Oryol State University
95 Komsomolskaya str., 302015, Oryol, Russia
The package of routines JET and help files for it are presented. There are html and mws files for help. The package contains more than 30 Maple routines for the symmetry analysis of evolution partial differential systems with two independent variables and related problems: computation of Lie-Bäcklund symmetries and conserved densities, computation of canonical densities and investigation of the complete integrability, computation of differential substitutions and Bäacklund transformations, computation of recursion operators and Noether operators; several computations in matrix Lie algebras, the check of the antisymmetry, symplectic and cosymplectic conditions of linear integrodifferential operators and some others. All routines and algorithms are described in the article. It can be used as the user's guide.