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一类推广的二变量和差分不等式及其在初边值问题中的应用 被引量:8

A New Generalized Sum-Difference Inequality with Two Variables and Applications to BVP
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摘要 建立了一个二变量的和差分不等式,该不等式不仅右端和号外的项是非常数项,而且包含k项未知函数和非线性函数的复合函数;运用单调化技巧和强单调概念给出了不等式中未知函数的上界估计;所得结果可以用来估计Cheung W S(2006)和王五生(2008)所研究的不等式中的未知函数;最后,用研究不等式得到的结果研究二变量差分方程初边值问题的有界性、唯一性和连续依赖性. In this paper, we establish a general form of sum-difference inequality in two variables, which contains both a nonconstant term outside the sums and k terms of nonlinear sums. We employ a technique of monotonization and use a property of stronger monotonicity to give an estimate for the unknown function. Our result enables us to solve those discrete inequalities considered in the work of Cheung W S (2006) and Wang W S (2008). Furthermore, we apply our result to a boundary value problem of a partial difference equation for boundedness, uniqueness and continuous dependence.
出处 《数学物理学报(A辑)》 CSCD 北大核心 2013年第2期340-353,共14页 Acta Mathematica Scientia
基金 国家自然科学基金(11161018) 广西自然科学基金(0991265,2012GXNSFAA053009) 广西教育厅科学研究基金(201106LX599,201204LX423) 广东省自然科学基金(10452408801004217)资助
关键词 和差分不等式 单调化 强单调性 有界性 Sum-difference inequality Monotonization Stronger nondecreasing Boundedness.
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  • 1王文霞,张玲玲.二阶非线性脉冲积分-微分方程初值问题的解[J].数学物理学报(A辑),2007,27(4):702-710. 被引量:4
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