Computing normal forms of nonseparable Hamiltonians by symbolic manipulation

Abstract Finding normal forms of nonintegrable Hamiltonians is a problem encountered in many branches of physics. In this article, a symbolic program is presented which uses a succession of canonical transformations to construct the Birkhoff- Gustavson normal form of a nonseparable Hamiltonian. Title of program: BIRKGUST Catalogue Id: ACHT_v1_0 Nature of problem This computer program constructs the normal form a nonintegrable Hamiltonian using Birkhoff-Gustavson Normal Form Theory. Versions of this program held in the CPC repository in Mendeley Data ACHT_v1_0; BIRKGUST; 10.1016/0010-4655(92)90117-H This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)