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arXiv 1405.4397math.RT
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非线性渗流方程Lie对称的整体作用

Global Actions of the Lie Symmetries of the Nonlinear Filtration Equation

Jose A. Franco

摘要:

对非线性渗流方程的李点对称性进行了分类,给出了一般情况和三种特殊情况。通过对一类特殊函数的限制,证明了非线性渗流方程的Lie对称在一般情形和三种特殊情形中的两种情形下指数化为可解李群的整体作用.我们表明,李点对称的行动不能全球化的第三种特殊情况。

英文摘要:

The classification of the Lie point symmetries of the nonlinear filtration equation gives the generic case and three special cases. By restricting to a special class of functions, we show that the Lie symmetries of the nonlinear filtration equation exponentiate to a global action of a solvable Lie group in the generic case and two of the three special cases. We show that the action of the Lie point symmetries cannot be globalized for the third special case.

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