TAILIEUCHUNG - Báo cáo hóa học: " Research Article ¨ On Multivariate Gruss Inequalities"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article ¨ On Multivariate Gruss Inequalities | Hindawi Publishing Corporation Journal of Inequalities and Applications Volume 2008 Article ID 249438 8 pages doi 2008 249438 Research Article On Multivariate Griiss Inequalities Chang-Jian Zhao1 and Wing-Sum Cheung2 1 Department of Information and Mathematics Sciences College of Science China Jiliang University Hangzhou 310018 China 2 Department of Mathematics The University of Hong Kong Pokfulam Road Hong Kong Correspondence should be addressed to Chang-Jian Zhao chjzhao@ Received 6 March 2008 Revised 7 May 2008 Accepted 20 May 2008 Recommended by Martin Bohner The main purpose of the present paper is to establish some new Gruss integral inequalities in n independent variables. Our results in special cases yield some of the recent results on Pachpatte s Mitrinovic s and Ostrowski s inequalities and provide new estimates on such types of inequalities. Copyright 2008 . Zhao and . Cheung. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction The well-known Gruss integral inequality 1 can be stated as follows see 2 page 296 1 . . Í 1 . i 1 d . . p-pj f x g x dx - prpj f i x J prpj g x dxj 4 P - p Q - q U1 provided that f and g are two integrable functions on a b such that p f x P q g x Q for all x G a b where p P q Q are real constants. Many generalizations extensions and variants of this inequality have appeared in the literature see 1-8 and the references given therein. The main purpose of the present paper is to establish several multivariate Gruss integral inequalities. Our results provide a new estimates on such type of inequalities. 2. Main results In what follows R denotes the set of real numbers Rn the n-dimensional Euclidean space. Let D X1 . xn ai xi bi i 1 . n . For a function u x Rn R we denote the 2 Journal of Inequalities and Applications first-order .

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