PreHamiltonian and Hamiltonian operators for differential-difference equations
PreHamiltonian and Hamiltonian operators for differential-difference equations
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微分差分方程的前哈密顿算子和哈密顿算子
DOI:
10.1088/1361-6544/ab5912
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发表时间:
2020
期刊:
影响因子:
1.7
通讯作者:
Carpentier S
中科院分区:
文献类型:
--
作者:
Carpentier S
In this paper we are developing a theory of rational (pseudo) difference Hamiltonian operators, focusing in particular on its algebraic aspects. We show that a pseudo-difference Hamiltonian operator can be represented as a ratio AB− 1 of two difference operators with coefficients from a difference field, where A is preHamiltonian. A difference operator A is called preHamiltonian if its image is a Lie subalgebra with respect to the Lie bracket of evolutionary vector fields on. The definition of a rational Hamiltonian operator can be reformulated in terms of its factors which simplifies the theory and makes it useful for applications. In particular we show that for a given rational Hamiltonian operator H in order to find a second Hamiltonian operator K compatible with H one only needs to find a preHamiltonian pair A and B such that K= AB− 1 H is skew-symmetric. We apply our theory to study multi-Hamiltonian structures of Narita–Itoh–Bogayavlensky and Adler–Postnikov equations.
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影响因子:
1
作者:
A. Sole;V. Kac;Daniele Valeri;M. Wakimoto
通讯作者:
M. Wakimoto
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
J. Sanders;Jing Ping Wang
通讯作者:
Jing Ping Wang
DOI:
10.1088/1751-8113/44/41/415203
发表时间:
2011
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
V E Adler;V. V. Postnikov
通讯作者:
V. V. Postnikov
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
A. Sole;V. Kac
通讯作者:
V. Kac
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Sylvain Carpentier;A. Sole;V. Kac
通讯作者:
V. Kac