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arXiv 0905.0720math-phmath.MP
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无穷维Hamilton-Jacobi理论与$L$ -可积性

Infinite-dimensional Hamilton-Jacobi theory and $L$-integrability

Cheng-shi Liu

摘要:

经典的Liouvile可积性是指对$2n$维相空间存在$n$独立的对合第一积分。然而,在无限维的情况下,无穷多个独立的第一积分的对合并不表明系统是可解的。为了使系统可解,我们需要多少个第一积分?为了回答这个问题,我们得到了一个无限维的Hamilton-Jacobi理论,并证明了一个无限维的Liouville定理。在此基础上,我们给出了无穷维Liouville可积性的一个修正定义。我们称之为$L$ -可积性。作为例子,我们证明了弦振动方程和KdV方程是$L$ -可积的.在一般情况下,我们证明了,如果一个Hamilton系统的所有作用变量都能由第一积分集重构,那么无穷多个积分是完备的。

英文摘要:

The classical Liouvile integrability means that there exist $n$ independent first integrals in involution for $2n$-dimensional phase space. However, in the infinite-dimensional case, an infinite number of independent first integrals in involution don't indicate that the system is solvable. How many first integrals do we need in order to make the system solvable? To answer the question, we obtain an infinite dimensional Hamilton-Jacobi theory, and prove an infinite dimensional Liouville theorem. Based on the theorem, we give a modified definition of the Liouville integrability in infinite dimension. We call it the $L$-integrability. As examples, we prove that the string vibration equation and the KdV equation are $L$-integrable. In general, we show that an infinite number of integrals is complete if all action variables of a Hamilton system can reconstructed by the set of first integrals.

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。

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