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arXiv 1703.05855nlin.SI
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一类Tzitzeica方程的孤子解

On the soliton solutions of a family of Tzitzeica equations

Corina N. Babalic, Radu Constantinescu, Vladimir S. Gerdjikov

摘要:

我们分析了一类Tzitzeica方程的几种孤子解。为此,我们使用两种方法推导孤子解:敷料方法和广田方法。敷料方法允许我们得到两种类型的孤子解。第一种类型对应于一组6对称位于离散本征值的Lax运营商$L$ ;每个孤子的第二种类型的一个涉及一组12离散本征值的$L$。我们还概述了如何构造包含第一类$N_1$孤子和第二类$N_2$孤子的一般$N$孤子解,即$N=N_1+N_2$。对孤子可能的奇异性和Tzitzeica方程族中不同成员之间变量变化的影响进行了简要的讨论。所有方程允许准正则以及奇异孤子解。

英文摘要:

We analyze several types of soliton solutions to a family of Tzitzeica equations. To this end we use two methods for deriving the soliton solutions: the dressing method and Hirota method. The dressing method allows us to derive two types of soliton solutions. The first type corresponds to a set of 6 symmetrically situated discrete eigenvalues of the Lax operator $L$; to each soliton of the second type one relates a set of 12 discrete eigenvalues of $L$. We also outline how one can construct general $N$ soliton solution containing $N_1$ solitons of first type and $N_2$ solitons of second type, $N=N_1+N_2$. The possible singularities of the solitons and the effects of change of variables that relate the different members of Tzitzeica family equations are briefly discussed. All equations allow quasi-regular as well as singular soliton solutions.

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