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E_n中齐次多项式芽生成的有限余维理想的判定和应用
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作者 童乾 岑燕明 《数学杂志》 CSCD 北大核心 2009年第4期539-542,共4页
本文研究了奇点理论中有限余维理想的一种判定方法,利用Arnold在θn中得出的结论以及Hilbert零点定理,获得C∞实函数芽环En中由齐次多项式芽生成的有限余维理想的特征和判定方法.其结果是有实用性和有效性的.
关键词 C∞实函数芽环 齐次多项项式芽 有限余维理想 hilbert零点定理
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C^∞实函数芽环中有限余维理想的判定和应用
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作者 童乾 岑燕斌 《贵州大学学报(自然科学版)》 2005年第4期364-367,共4页
在复解析函数芽环中,V.I.Arnold用生成元的公共根的性质给出了有限余维理想的一个判定方法.作者借助Arnold的结果和H ilbert零点定理,得到了C∞实函数芽环En中有限余维理想的特征和判定方法.最后,给出一些应用例子加以说明.
关键词 C^∞实函数芽环 有限余维理想 hilbert零点定理
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Approximate controllability of impulsive neutral stochastic functional differential system with state-dependent delay in Hilbert spaces
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作者 P.MUTHUKUMAR C.RAJIVGANTHI 《控制理论与应用(英文版)》 EI CSCD 2013年第3期351-358,共8页
Many practical systems in physical and technical sciences have impulsive dynamical behaviors during the evolution process which can be modeled by impulsive differential equations. In this paper, we prove the approxima... Many practical systems in physical and technical sciences have impulsive dynamical behaviors during the evolution process which can be modeled by impulsive differential equations. In this paper, we prove the approximate controllability of control systems governed by a class of impulsive neutral stochastic functional differential system with state-dependent delay in Hilbert spaces. Sufficient conditions for approximate controllability of the control systems are established under the natural assumption that the corresponding linear system is approximately controllable. The results are obtained by using semigroup theory, stochastic analysis techniques, fixed point approach and abstract phase space axioms. An example is provided to illustrate the application of the obtained results. 展开更多
关键词 Approximate controllability hilbert space Impulsive neutral stochastic functional differential system semigroup theory sadovskii’s fixed point theorem
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