Template-Type: ReDIF-Paper 1.0 Series: Tinbergen Institute Discussion Papers Creation-Date: 1998-03-04 Number: 98-019/1 Author-Name: Jan Brinkhuis Author-Email: brinkhuis@few.eur.nl Author-Workplace-Name: Econometric Institute, Erasmus University Rotterdam Title: On the Principle of Fermat-Lagrange for Mixed Smooth-Convex Extremal Problems Abstract: A necessary condition - the Principle of Fermat-Lagrange - is offered for mixed smooth-convexoptimization problems. This generalizes and unifies most of the known necessary conditions forconcrete finite and infinite dimensional optimization problems of interest. The new idea in comparisonwith the unified version of Tikhomirov and others ([I-T], [A-T-F] and [T]) is that a geometricalconstruction of the principle is given. In the present set-up constraints are not mentioned explicitly, thefeasibility set is allowed to vary in a non-standard way and the objective function is also allowed tovary. An equivalent analytical formulation is given as well; we propose a new standard form foroptimization problems which allows greater flexibility. File-Url: https://papers.tinbergen.nl/98019.pdf File-Format: application/pdf File-Size: 232948 bytes Handle: RePEc:tin:wpaper:19980019