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Čebyšev inequalities for co-ordinated QC-convex and (s, QC)-convex B. Meftah1,∗ and A. Souahi2 1 Laboratoire des Télécommunications, Faculté des Sciences et de la Technologie, University of 8 May 1945 Guelma, P.O. Box 401, 24000 Guelma, Algeria. 2 Laboratory of Advanced Materials, University of Badji Mokhtar-Annaba, P.O. Box 12, 23000 Annaba, Algeria. * Correspondence: badrimeftah@yahoo.fr Received: 19 July 2020; Accepted: 1 January 2021; Published: 23 January 2021. Abstract: In this paper, we establish some new Čebyšev type inequalities for functions whose modulus of the mixed derivatives are co-ordinated quasi-convex and α-quasi-convex and s-quasi-convex functions.

Cebyšev inequalities for co-ordinated \(QC\)-convex and \((s,QC)\)-convex