arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1002.0988nlin.SI
收藏

关于Darboux可积半离散链

On Darboux Integrable Semi-Discrete Chains

Ismagil Habibullin, Natalya Zheltukhina, Alfia Sakieva

摘要:

研究了未知数$t(n,x)$依赖于连续变量$x$和离散变量$n$的微分差分方程$\frac{d}{dx}t(n+1,x)=f(x,t(n,x),t(n+1,x),\frac{d}{dx}t(n,x))$.我们称这样一个方程为达布可积的,如果存在两个函数(称为积分)$F$和$I$,其动力变量的个数有限,使得$D_xF=0$和$DI=I$,其中$D_x$是关于$x$的全微分算子,$D$是移位算子:$Dp(n)=p(n+1)$。证明了积分可以化为某种标准型。讨论了达布可积链通解的一个显式构造方法,并对一类链求出了通解。

英文摘要:

Differential-difference equation $\frac{d}{dx}t(n+1,x)=f(x,t(n,x),t(n+1,x),\frac{d}{dx}t(n,x))$ with unknown $t(n,x)$ depending on continuous and discrete variables $x$ and $n$ is studied. We call an equation of such kind Darboux integrable, if there exist two functions (called integrals) $F$ and $I$ of a finite number of dynamical variables such that $D_xF=0$ and $DI=I$, where $D_x$ is the operator of total differentiation with respect to $x$, and $D$ is the shift operator: $Dp(n)=p(n+1)$. It is proved that the integrals can be brought to some canonical form. A method of construction of an explicit formula for general solution to Darboux integrable chains is discussed and for a class of chains such solutions are found.

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。

↑