TY - CHAP ID - iiasa13686 UR - https://pure.iiasa.ac.at/id/eprint/13686/ A1 - Casti, J. Y1 - 1984/09// N2 - It is argued that a modelling relation in an encoding of a set of physical observables, characterising a natural system N, into an appropriate formal mathematical structure. The theorems of the formal structure are then decoded into true statements about N. Various system-theoretic concepts such as bifurcation, similarity, system analogy, reductionism, and complexity are then seen to be naturally expressed. PB - Gower SN - 978-0566006852 ED - Bahrenberg, G. ED - Fischer, M. ED - Nijkamp, P. TI - On the theory of models and the modelling of natural phenomena. SP - 73 AV - none EP - 92 T2 - On the theory of models and the modelling of natural phenomena. ER -