Wl. Chan et al., ON GENERALIZED 2ND-ORDER DERIVATIVES AND TAYLOR EXPANSIONS IN NONSMOOTH OPTIMIZATION, SIAM journal on control and optimization, 32(3), 1994, pp. 591-611
A representation of Cominetti and Correa's generalized second-order di
rectional derivative [SIAM J. Control Optim., 28 (1990), pp. 789-8091
is given and then applied to obtain a Taylor theorem type result. A co
njecture in [SIAM J. Control Optim, 28 (1990), pp. 789-8091 concerning
functions of the form max1 less-than-or-equal-to i less-than-or-equal
-to n g(i)(x) is proved under a strengthened assumption, but not true
otherwise.