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arXiv 1102.1298math-phmath.MPphysics.flu-dyn
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二维涡度方程Nambu括号的代数构造

Algebraic construction of a Nambu bracket for the two-dimensional vorticity equation

Matthias Sommer, Katharina Brazda, Michael Hantel

摘要:

到目前为止,流体机械Nambu支架主要是在直观的基础上给出的。另一种方法是在这里给出二维涡量方程的这种括号的算法构造。从李-泊松形式和它的代数性质,它示出了如何Nambu表示可以明确地构造为连续极限从结构保持Zeitlin离散化。

英文摘要:

So far fluid mechanical Nambu brackets have mainly been given on an intuitive basis. Alternatively an algorithmic construction of such a bracket for the two-dimensional vorticity equation is presented here. Starting from the Lie--Poisson form and its algebraic properties it is shown how the Nambu representation can be explicitly constructed as the continuum limit from the structure preserving Zeitlin discretization.

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