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We also investigate Mond\u2013Weir type dual problems under assumptions of <jats:italic>\u03b5<\/jats:italic>-quasi pseudo-generalized convexity. Next, we provide an application to a nonsmooth fractional semi-infinite multiobjective optimization problem. Finally, some examples are given to illustrate the obtained results. The obtained results improve or include some recent known ones.<\/jats:p>","DOI":"10.1051\/ro\/2024015","type":"journal-article","created":{"date-parts":[[2024,1,19]],"date-time":"2024-01-19T09:09:37Z","timestamp":1705655377000},"page":"1163-1186","source":"Crossref","is-referenced-by-count":5,"title":["Approximate proper efficiencies in nonsmooth semi-infinite multiobjective optimization problems"],"prefix":"10.1051","volume":"58","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6839-709X","authenticated-orcid":false,"given":"Thanh-Hung","family":"Pham","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"250","published-online":{"date-parts":[[2024,3,13]]},"reference":[{"key":"R1","doi-asserted-by":"crossref","first-page":"260","DOI":"10.1016\/j.orl.2016.02.003","volume":"44","author":"Chuong","year":"2016","journal-title":"Oper. Res. 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