“…The properties of scalar or vector functions that are -stable at some point functions and their applications in optimization were studied e. g. in [1,2,3,4,5,6,7,8,9,12,13,15,16,24,25,28,30,31]. Let us remind that a second-order sufficient optimality condition for the constrained scalar problem for -stable at some point function in terms of Dini derivatives was introduced in [28].…”