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一类差分不等式及其应用

A Difference Inequality and Its Application
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摘要 建立一类二变量的和差分不等式,该不等式包含了一个一重和与两个二重和,二重和号内包含两个不同的没有假设单调性的未知函数的复合函数.使用单调化技术,利用了强单调的性质,给出了差分不等式中未知函数的估计.结果能使我们对相关文献中考虑的差分不等式中未知函数进行估计.进一步,用结果给出了一类差分方程解的估计. We establish a general form of difference inequality in two variables, which includes both one one-fold sum and two two-fold sums, the latter contain two distinct composite functions of unknown function without an assumption of monotonicity. We employ a technique of monotonization to give an estimate for. the unknown function in the difference inequality. Our result enables us to solve those discrete inequalities considered in theorem 2.6 of [J. Comput. Appl. Math, 2007, 202,339-351]. Furthermore, we apply our result to give estimation of solutions of a difference equation.
机构地区 河池学院数学系
出处 《数学的实践与认识》 CSCD 北大核心 2008年第22期229-235,共7页 Mathematics in Practice and Theory
基金 广西教育厅科学研究项目(桂教科研[2007]34号文件)<差分不等式研究>200707MS112 河池学院自然科学研究项目<Gronwall微分积分不等式及其应用研究>2006N001 广西新世纪教改工程"十一五"第三批资助项目(桂高教2007(109号文件)<基于"四种能力"培养目标上的数学建模教学改革研究与实践> 河池学院教改项目2006E006和2007E006 河池学院重点学科(院科研[2007]2号)<应用数学重点学科> 河池学院重点课程<数学建模>(院教学[2008]9号)
关键词 二变量差分不等式 二变量差分方程 解的估计 difference inequality in two variables difference equation in two variables estimation of solutions
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参考文献8

  • 1Cheung W S. Some discrelc nonlinear inequalities anti applications to boundary value problems for difference equations[J]. J Difference Equ Appl,2004,10:213-223.
  • 2Cheung W S. Discrete non-linear inequalities anti applications to boundary value problems[J]. J Math Anal Appl. 2006.319 : 708-724.
  • 3Pachpattc B G. On some new inequalities related to certain inequalities in the theory of differential equations[J]. J Math Anal Appl,1995.189;128-141.
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  • 6Qing-Hua Ma, Cheung W S. Some new nonlinear difference inequalities and their applications[J].J Comput Appl Math, 2007,202 : 339-351.
  • 7Wang W S. A generalized retarded Gronwall-like inequality in lwo variables and applications to BVP[J]. Appl Malh Comput, 2007,191:144-154.
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