Irreversible processes at nonequilibrium steady states and Lyapounov functions.
Nonequilibrium stability theory is reviewed. In answer to recent comments by Fox [Fox, R. F. (1979) Proc. Natl. Acad. Sci. USA 76, 2114-2117], it is pointed out that various choices of Lyapounov functions are possible in the nonlinear range of irreversible phenomena.
Nicolis
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Université Libre de Bruxelles, Campus Plaine, C.P. 231, 1050 Brussels, Belgium.
Prigogine
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