On the singularity structure of the discrete KdV equation
On the singularity structure of the discrete KdV equation
复制标题
离散KdV方程的奇点结构
DOI:
10.1088/1751-8121/ab72af
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
B. Grammaticos and A. Ramani
中科院分区:
文献类型:
--
作者:
D. Um;R. Willox;B. Grammaticos and A. Ramani
The discrete KdV (dKdV) equation, the pinnacle of discrete integrability, is often thought to possess the singularity confinement property because it confines on an elementary quadrilateral. Here we investigate the singularity structure of the dKdV equation through reductions of the equation, obtained for initial conditions on a staircase with height 1, and show that it is much more subtle than one might assume. We first study the singularities for the mappings obtained after reduction and contrast these with the singularities that arise in non-integrable generalizations of those mappings. We then show that the so-called'express method'for obtaining dynamical degrees for second order mappings can be succesfully applied to all the higher order mappings we derived. Finally, we use the information obtained on the singularity structure of the reductions to describe an important subset of singularity patterns for the dKdV equation and we present an example of a non-confining pattern and explain why its existence does not contradict the integrability of the dKdV equation.
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DOI:
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发表时间:
2001
期刊:
影响因子:
--
作者:
J. Diller;C. Favre
通讯作者:
C. Favre
影响因子:
2.4
作者:
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DOI:
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期刊:
Journal of Physics A
影响因子:
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作者:
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DOI:
10.1098/rspa.2016.0831
发表时间:
2017-05
期刊:
Proceedings. Mathematical, physical, and engineering sciences
影响因子:
--
作者:
Halburd RG
通讯作者:
Halburd RG
DOI:
10.1201/9780429470462-3
发表时间:
2018
期刊:
Nonlinear Systems and Their Remarkable Mathematical Structures
影响因子:
--
作者:
B. Grammaticos;A. Ramani;R. Willox;T. Mase
通讯作者:
T. Mase