Models are described in a text file according to a reduced declaration language, close to the mathematical formulation. The program is run with the model file as input and the system can be studied interactively by means of simple commands producing convenient graphics and numerical results. The kernel of ULM is a symbolic evaluator. Stochastic models are handled via Monte Carlo simulation. Windows 3.xx see section V. ULM is distributed free of charge.
Users are under their own responsibility.
References Caswell, H., 1989. Matrix Population Models. Theory and practice with ULM software, Acta OEcologica, 17. Legendre, S., Clobert, J., 1995. Tuljapurkar, S., 1990.