Article
Keywords:
optimality conditions; existence of a local solution; contact cone approximations
Summary:
The relation between the general optimality conditions in terms of contact cones and the Kuhn-Tucker conditions in the special case of pseudo-convex and quasi-convex functions and their consequence to Lagrangian multipliers are given.
References:
                        
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First-order necessary condition for the existence of optimal point  in nonlinear programming problem. Aplikace matematiky 25 (1980), 257-266. 
MR 0583586 
[2] Jan Palata: 
Eine hinreichende Bedingung für die Existenz eines eindeutigen lokalen Extremums. Math. Operationsforsch. u. Statist. 11 (1980), No. 4, 531-536. 
DOI 10.1080/02331938008842684 | 
MR 0637315