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退化抛物型方程与单侧约束系统
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作者 郭兴明 《应用数学和力学》 EI CSCD 北大核心 1996年第10期927-932,共6页
本文讨论了一类非线性非自治多值的退化抛物型方程解的存在性和解的正则性等.它代表一类具非线性本构约束及不可微外约束的能量耗散的物理、力学和优化等问题.
关键词 抛物型方程 存在性 单侧约束系统 正则性
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Mei Symmetry and Lutzky Conserved Quantity for Nonholonomic Mechanical System with Unilateral Constraints
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作者 JING Hong-Xing LI Yuan-Cheng 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第3期575-578,共4页
In this paper, we study the Mei symmetry which can result in a Lutzky conserved quantity for nonholonomic mechanical system with unilateral constraints. The definition and the criterion of the Mei symmetry for the sys... In this paper, we study the Mei symmetry which can result in a Lutzky conserved quantity for nonholonomic mechanical system with unilateral constraints. The definition and the criterion of the Mei symmetry for the system are given. The necessary and sufficient condition under which the Mei symmetry is a Lie symmetry for the system is obtained. A Lutzky conserved quantity deduced from the Mei symmetry is gotten. An example is given to illustrate the application of our results. 展开更多
关键词 nonholonomic mechanical system unilateral constraint Mei symmetry Lutzky conserved quantity
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