  The computation of coefficients of amplitude systems for Turing bifurcations
is a straightforward but sometimes elaborate task, in particular for 2D or 3D
wave vector lattices. The Matlab tool ampsys automates such computations for
two classes of problems, namely scalar equations of Swift-Hohenberg type and
generalizations, and reaction-diffusion systems with an arbitrary number of
components. The tool is designed to require minimal user input, and for a
number of cases can also deal with symbolic computations. After a brief review
of the setup of amplitude systems we explain the tool by a number of 1D, 2D and
3D examples over various wave vector lattices.
