Lagrangian multiforms and multidimensional consistency

Lagrangian multiforms and multidimensional consistency
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拉格朗日多形式和多维一致性

DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
F. Nijhoff
F. Nijhoff
中科院分区:
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文献类型:
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作者:
S. Lobb;F. Nijhoff

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我们证明了一类二维可积格点方程的拉格朗日算子嵌入到高维格点时,服从一个封闭关系。在此基础上,我们制定了拉格朗日描述这样的系统的拉格朗日多形。我们讨论了这种形式主义与多维一致性的概念的连接,以及从相关变分原理的角度来看格的作用。
We show that well-chosen Lagrangians for a class of two-dimensional integrable lattice equations obey a closure relation when embedded in a higher dimensional lattice. On the basis of this property we formulate a Lagrangian description for such systems in terms of Lagrangian multiforms. We discuss the connection of this formalism with the notion of multidimensional consistency, and the role of the lattice from the point of view of the relevant variational principle.