Journal of Applied Crystallography

Volume 36, Part 3 Number 2 (June 2003)

computer program abstracts

J. Appl. Cryst. (2003). 36, 951-952 [ doi:10.1107/S0021889803005946 ]

INVARIANTS: program for obtaining a list of invariant polynomials of the order-parameter components associated with irreducible representations of a space group

D. M. Hatch and H. T. Stokes

Synopsis: The program INVARIANTS, which aims to generate symmetry-allowed invariants associated with a given high-symmetry group H and the primary order parameter, along with invariants and coupling polynomials of the secondary order parameters, is described.

Keywords: order parameters; space group; irreducible representation; invariants; Landau theory.