A minimal model for forest fire regimes Renato Casagrandi * and Sergio Rinaldi B Address for further correspondence Professor Sergio Rinaldi CIRITA Politecnico di Milano phone 39-2-23993563 Via Ponzio, 34/5 fax 39-2-23993412 20133 Milano, Italy. e-mail: rinaldi@elet.polimi.it * Ph.D. student in Ecology at the Politecnico di Milano, Milano, Italy. B Director of Centro Interdipartimentale di Ricerca in Informatica Territoriale e Ambientale (CIRITA), Politecnico di Milano, Milano, Italy.