arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1806.08511nlin.SI
收藏

寻找四元方程的CAC-可积齐次三元组及其BT和Lax分类

Search for CAC-integrable homogeneous quadratic triplets of quad equations and their classification by BT and Lax

Jarmo Hietarinta

摘要:

我们考虑二维晶格方程定义在一个基本正方形的笛卡尔晶格,并取决于在四边形的角落的变量。对于这样的方程,通常与可积性相关的属性是“多维一致性”(MDC):应该可以将方程从二维扩展到更高维,以便嵌入的二维晶格方程是相容的。通常使用"Consistency-Around-a-Cube"(CAC)检查兼容性。在这种情况下,通常假设立方体的六个侧面上的方程是相同的(直到晶格参数),但是在Boll \cite{Boll2011}的分类中,这种假设被放宽了。我们在这里提出的结果的搜索和分类的均匀二次三元组的多维一致的晶格方程,允许不同的方程在三个正交的平面(因此三元组),但使用相同的方程在平行的平面上。没有关于对称性或四面体性质的假设。然后将结果按子集/极限性质分组,并通过其贝克隆变换的有效性或等效地通过其拉克斯对的质量(假或不假)进行分析。

英文摘要:

We consider two-dimensional lattice equations defined on an elementary square of the Cartesian lattice and depending on the variables at the corners of the quadrilateral. For such equations the property often associated with integrability is that of "multidimensional consistency" (MDC): it should be possible to extend the equation from two to higher dimensions so that the embedded two-dimensional lattice equations are compatible. Usually compatibility is checked using "Consistency-Around-a-Cube" (CAC). In this context it is often assumed that the equations on the six sides of the cube are the same (up to lattice parameters), but this assumption was relaxed in the classification of Boll \cite{Boll2011}. We present here the results of a search and classification of homogeneous quadratic triplets of multidimensionally consistent lattice equations, allowing different equations on the three orthogonal planes (hence triplets) but using the same equation on parallel planes. No assumptions are made about symmetry or tetrahedron property. The results are then grouped by subset/limit properties, and analyzed by the effectiveness of their Bäcklund transformations, or equivalently, by the quality of their Lax pair (fake or not).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑