arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2407.06381math-phmath.MPnlin.SI
收藏

由条件对称性诱导的耦合 Burgers 类方程层级

Hierarchy of coupled Burgers-like equations induced by conditional symmetries

M. Gorgone, F. Oliveri, E. Sgroi

AI总结:

本文基于条件对称性推导出可统一的奇偶两类无限耦合 Burgers 类方程层级,利用矩阵 Hopf-Cole 变换实现线性化求解,并证明各层级元素均拥有同构的五维经典点对称李代数。

摘要:

已知经典 Burgers 方程的 $Q$-条件对称性可以用满足耦合 Burgers 类方程组的三个函数来表示。寻找该系统的条件对称性会导出一个由五个耦合 Burgers 类方程组成的系统。以后者为起点并迭代该过程,可以猜想存在一个由奇数个耦合 Burgers 类方程组成的系统的无限层级。此外,从一对 Burgers 类方程出发,可能会产生一个由偶数个耦合 Burgers 类方程组成的系统的类似层级。我们证明这两个无限层级可以被统一,且该层级中的每个元素都源于前一个元素的非经典对称性。将该层级的一个通用元素写成矩阵 Burgers 方程,矩阵 Hopf-Cole 变换的存在使其线性化并能够确定其解。最后,表明该层级中的每个元素都具有一个五维的经典点对称李代数。尽管这些李代数是在不同维度的流形中实现的,但它们都是同构的。

英文摘要:

It is known that $Q$-conditional symmetries of the classical Burgers' equation express in terms of three functions satisfying a coupled system of Burgers-like equations. The search of conditional symmetries of this system leads to a system of five coupled Burgers-like equations. Using the latter system as a starting point, and iterating the procedure, an infinite hierarchy of systems made of an odd number of coupled Burgers-like equations can be conjectured. Moreover, starting from a pair of Burgers-like equations, a similar hierarchy of systems made of an even number of coupled Burgers-like equations may arise. We prove that these two infinite hierarchies can be unified, and each element of the hierarchy arises from the nonclassical symmetries of the previous one. Writing a generic element of this hierarchy as a matrix Burgers' equation, the existence of the matrix Hopf-Cole transformation allows for its linearization and the determination of its solutions. Finally, it is shown that each element of the hierarchy possesses a five-dimensional Lie algebra of classical point symmetries. Though these Lie algebras are realized in manifolds with different dimensionality, they are all isomorphic.

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。

↑