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arXiv 0910.4822math-phcond-mat.stat-mechhep-thmath.MPphysics.flu-dyn
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奇异共形Galilei代数与非线性偏微分方程

The exotic conformal Galilei algebra and nonlinear partial differential equations

Roman Cherniha, Malte Henkel

摘要:

利用共形Galilei代数(CGA)和奇异共形Galilei代数(ECGA)构造了包含这些代数的偏微分方程(PDE)和偏微分方程组。我们表明,有没有单一的二阶偏微分方程不变的CGA下,但系统的偏微分方程可以承认这个代数。此外,还存在一类非线性偏微分方程,它们在CGA下是条件不变的。它进一步表明,有系统的非线性偏微分方程承认ECGA的实现最近在[D。Martelli和Y. Tachikawa,arXiv:0903.5184v2 [hep-th](2009)].此外,广泛的类的非线性系统,不变下的两个不同的10维子代数的ECGA明确构造和一个例子与可能的物理解释。

英文摘要:

The conformal Galilei algebra (CGA) and the exotic conformal Galilei algebra (ECGA) are applied to construct partial differential equations (PDEs) and systems of PDEs, which admit these algebras. We show that there are no single second-order PDEs invariant under the CGA but systems of PDEs can admit this algebra. Moreover, a wide class of nonlinear PDEs exists, which are conditionally invariant under CGA. It is further shown that there are systems of non-linear PDEs admitting ECGA with the realisation obtained very recently in [D. Martelli and Y. Tachikawa, arXiv:0903.5184v2 [hep-th] (2009)]. Moreover, wide classes of non-linear systems, invariant under two different 10-dimensional subalgebras of ECGA are explicitly constructed and an example with possible physical interpretation is presented.

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