In mathematics, Clarke's generalized Jacobian is a generalization of the Jacobian matrix of a smooth function to non-smooth functions. It was introduced by Clarke (1983).
References Clarke, Frank H. (1983), Optimization and nonsmooth analysis, Canadian Mathematical Society Series of Monographs and Advanced Texts. A Wiley-Interscience Publication, New York: John Wiley & Sons, ISBN 0-471-87504-X, MR 0709590