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An elementary treatment of the theory of equilibrium problems and equilibrium version of Ekeland's variational principle is also provided. New topics such as equilibrium problems, variational principles, Caristi's fixed point theorem, and Takahashi's minimization theorem with their applications are also included.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ GARDNERS","offer_id":49746877546769,"sku":"NGR9781009351454","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/1009351451.jpg?v=1786135642"},{"product_id":"recent-developments-in-vector-optimization-book-qamrul-hasan-ansari-9783642271069","title":"Recent Developments in Vector Optimization","description":"We always come cross several decision-making problems in our daily life. Such problems are always conflicting in which many different view points should be satisfied. 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