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Optimality and duality for vector optimization problem with non-convex feasible set

  • S. K. Suneja
  • Sunila Sharma
  • Priyanka YadavEmail author
Theoretical Article


The Karush–Kuhn–Tucker (KKT) optimality conditions are necessary and sufficient for a convex programming problem under suitable constraint qualification. Recently, several papers (Dutta and Lalitha in Optim Lett 7(2):221–229, 2013; Lasserre in Optim Lett 4(1):1–5, 2010; Suneja et al. Am J Oper Res 3(6):536–541, 2013) have appeared wherein the convexity of constraint function has been replaced by convexity of the feasible set. Further, Ho (Optim Lett 11(1):41–46, 2017) studied nonlinear programming problem with non-convex feasible set. We have used this modified approach in the present paper to study vector optimization problem over cones. The KKT optimality conditions are proved by replacing the convexity of the objective function with convexity of strict level set, convexity of feasible set is replaced by a weaker condition and no condition is assumed on the constraint function. We have also formulated a Mond–Weir type dual and proved duality results in the modified setting. Our results directly extend the work of Ho (2017) Suneja et al. (2013) and Lasserre (2010).


Vector optimization Cones Level sets KKT conditions Duality 

Mathematics Subject Classification

90C26 90C29 90C30 90C46 



The authors are grateful to the referees and the editor for their valuable comments and helpful suggestions.


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Copyright information

© Operational Research Society of India 2019

Authors and Affiliations

  1. 1.Department of MathematicsUniversity of DelhiDelhiIndia
  2. 2.Department of Mathematics, Miranda HouseUniversity of DelhiDelhiIndia
  3. 3.Department of Mathematics, Atma Ram Sanatan Dharma CollegeUniversity of DelhiDelhiIndia

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