Small convex-valued subdifferentials in mathematical programming
B. D. Craven, Danny Ralph, B. M. Glover · Optimization · 1995
Various concepts of subdifferential for locally Lipschitz functions in finite dimensions are compared and a new characterization of a small convex-valued subdifferential is given A Fritz-John optimallty condition is derived for abstract nonsmooth programming problems in infinite dimensions uslng the Michel-Penot subdifferential and the concept of a strongly Lipschitz mapping