title: Chaos theory before Lorenz.
abstract: We consider the precursors to the discovery of sensitive dependence on initial conditions by Edward Lorenz (1963) in his model of climatic fluid dynamics. This will focus on work in various disciplines that imply either such sensitivity, irregular endogenous dynamic patterns, or fractal nature of an attractor, as is also found in the attractor underlying the model Lorenz studied. Going from ancient hints in Anaxagoras through nineteenth century mathematics and physics, the main areas of such development will be argued to have been in celestial mechanics, oscillators, and economics.
authors.affiliation: Department of Economics, James Madison University, Harrisonburg, VA 22807, USA. rosserjb@jmu.edu
authors.forename: J Barkley
authors.initials: JB
authors.lastname: Rosser