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Hermite-Hadamard’s inequalities for (h, r)-preinvex functions


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Badreddine Meftah
Laboratoire des télécommunications Faculté des Sciences, et de la Technologie University of 8 MayGuelma, Algeria
Abdourazek Souahi
Laboratory of advanced materials.University of Badji Mokhtar of Annaba Faculty of sciences, Department of mathematicsAnnaba, Algeria