Ludwig von Bertalanffy
Karl Ludwig von Bertalanffy (September_19, 1901, Vienna, Austria - June_12, 1972, New York, USA) was a biologist who was a founder of general systems theory.
An Austrian citizen, he did much work in the United States. However, he experienced discrimination at the behest of American academe in that he declined to portray himself as a victimised refugee from Nazism and returned to work in Europe.
The individual growth model published by von Bertanlanffy in 1934 is widely used in biological models and exists in a number of permutations. A more general version was proposed by F. J. Richards in 1959. The growth model is a differential equation in the tradition of earlier demographic models, also used to model Population dynamics
