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SOME DISCRETE NONLINEAR INEQUALITIES AND APPLICATIONS TO DIFFERENCE EQUATIONS 被引量:3
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作者 cheung wing-sum Ma Qing-Hua Josip Pecaric 《Acta Mathematica Scientia》 SCIE CSCD 2008年第2期417-430,共14页
In this article, the authors establish some new nonlinear difference inequalities in two independent variables, which generalize some existing results and can be used as handy tools in the study of qualitative as well... In this article, the authors establish some new nonlinear difference inequalities in two independent variables, which generalize some existing results and can be used as handy tools in the study of qualitative as well as quantitative properties of solutions of certain classes of difference equations. 展开更多
关键词 Discrete Gronwll-Bellman-Ou-Iang type inequalities a Priori bound difference equation boundary value problems
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Radial mean bodies of simplices 被引量:2
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作者 倪建华 熊革 cheung wing-sum 《Journal of Shanghai University(English Edition)》 CAS 2007年第1期49-51,共3页
In this paper, it is proved that the radial pth mean body RpK(p 〉 0) is homothetic to the difference body DK when K is a simplex, Furthermore, the equality Rp(Rq) = Rq(Rp) is established when p 〉 0 and q 〉 0.... In this paper, it is proved that the radial pth mean body RpK(p 〉 0) is homothetic to the difference body DK when K is a simplex, Furthermore, the equality Rp(Rq) = Rq(Rp) is established when p 〉 0 and q 〉 0. It is also proved the Brunn-Minkowski inequality of radial pth mean body of simplex and uniqueness property. 展开更多
关键词 convex body radial mean body SIMPLEX covariogram.
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Firey linear combinations of convex bodies
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作者 熊革 肖启名 cheung wing-sum 《Journal of Shanghai University(English Edition)》 CAS 2009年第2期102-104,共3页
For convex bodies, the Firey linear combinations were introduced and studied in several papers. In this paper the mean width of the Firey linear combinations of convex bodies is studied, and the lower bound of the mea... For convex bodies, the Firey linear combinations were introduced and studied in several papers. In this paper the mean width of the Firey linear combinations of convex bodies is studied, and the lower bound of the mean width of the Firey linear combinations of convex body and its polar body is given. 展开更多
关键词 convex body Firey linear combination mean width
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Inclusion measures of convex bodies(Ⅱ)
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作者 熊革 cheung wing-sum 《Journal of Shanghai University(English Edition)》 CAS 2007年第6期545-548,共4页
In this paper, several inequalities for inclusion measures of convex bodies were obtained. The inclusion measure was proved to have concavity by considering the property of relative inner parallel body.
关键词 convex body inclusion measure.
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On a non-abelian invariant on complex surfaces of general type Dedicated to Professor Sheng GONG on the occasion of his 75th birthday
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作者 cheung wing-sum WONG Bun 《Science China Mathematics》 SCIE 2006年第12期1897-1900,共4页
In this paper,we give certain homotopy and diffeomorphism versions as a generalization to an earlier result due to W.S.Cheung,Bun Wong and Stephen S.T.Yau concerning a local rigidity problem of the tangent bundle over... In this paper,we give certain homotopy and diffeomorphism versions as a generalization to an earlier result due to W.S.Cheung,Bun Wong and Stephen S.T.Yau concerning a local rigidity problem of the tangent bundle over compact surfaces of general type. 展开更多
关键词 Chern numbers complex surfaces of general type coholomogy group local moduli local deformation space Miyaoka-Yau inequality Yau's global rigidity theorem Yau's uniformization theorem.
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Remarks on two theorems of Qi-Keng Lu
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作者 cheung wing-sum WONG Bun 《Science China Mathematics》 SCIE 2008年第4期773-776,共4页
Two alternate arguments in the framework of intrinsic metrics and measures respectively of part of the proof of a famous theorem due to Qi-Keng Lu on Bergman metric with constant negative holomorphic sectional curvatu... Two alternate arguments in the framework of intrinsic metrics and measures respectively of part of the proof of a famous theorem due to Qi-Keng Lu on Bergman metric with constant negative holomorphic sectional curvature are presented.A relationship between the Lu constant and the holo- morphic sectional curvature of the Bergman metric is given.Some recent progress of the Yau’s porblem on the characterization of domain of holomorphy on which the Bergman metric is K(?)hler-Einstein is described. 展开更多
关键词 Bergman metric holomorphic sectional curvature intrinsic metrics and measures Qi-Keng Lu theorem 32F45 32Q05 32W20
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