In this paper. we introduce the notion of higher-order weak adjacent epiderivative for a set-valued map without lower-order approximating directions and obtain existence theorem and some properties of the epiderivative. Then by virtue of the epiderivative and Benson proper efficiency. we establish the higher-order Mond-Weir type dual problem for a set-valued optimization problem and o... https://fitnessgravesyardes.shop/product-category/rear-end-cap/