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Smooth and non-smooth traveling wave solutions of some generalized Camassa-Holm equations

机译:一些广义Camassa-Holm方程的光滑和非光滑行波解

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摘要

In this paper we employ two recent analytical approaches to investigate the possible classes\udof traveling wave solutions of some members of a recently-derived integrable family of generalized\udCamassa-Holm (GCH) equations.\udA recent, novel application of phase-plane analysis is employed to analyze the singular traveling wave\udequations of three of the GCH NLPDEs, i.e. the possible non-smooth peakon, cuspon and compacton\udsolutions. Two of the GCH equations do not support singular traveling waves. The third equation\udsupports four-segmented, non-smooth $M$-wave solutions, while the fourth supports both solitary\ud(peakon) and periodic (cuspon) cusp waves in different parameter regimes.\udMoreover, smooth traveling waves of the four GCH equations are considered. Here, we use a recent\udtechnique to derive convergent multi-infinite series solutions for the homoclinic and heteroclinic orbits\udof their traveling-wave equations, corresponding to pulse and front (kink or shock) solutions\udrespectively of the original PDEs. We perform many numerical tests in different parameter regime to\udpinpoint real saddle equilibrium points of the corresponding GCH equations, as well as ensure\udsimultaneous convergence and continuity of the multi-infinite series solutions for the homoclinic and\udheteroclinic orbits anchored by these saddle points. Unlike the majority of unaccelerated convergent\udseries, high accuracy is attained with relatively few terms. We also show the traveling wave nature of\udthesepulse and front solutions to the GCH NLPDEs.
机译:在本文中,我们采用两种最新的分析方法来研究最近派生的广义\ udCamassa-Holm(GCH)方程组的某些成员的可能类别\ udof行波解。\ ud相位平面的最新应用运用分析法分析了三个GCH NLPDE的奇异行波/余量,即可能的非光滑波峰,cuspon和Compacton \ udsolution。 GCH方程中的两个不支持奇异行波。第三个方程\ ud支持四段非光滑的$ M $波解,而第四个方程同时支持不同参数体制中的孤立\ ud(peakon)和周期(cuspon)尖点波。\ ud此外,考虑了四个GCH方程。在这里,我们使用一种最新的\ udtechnique技术为它们的行波方程的同宿和异宿轨道导出收敛的多无限级数解,分别对应于原始PDE的脉冲和前沿(扭结或冲击)解。我们在不同的参数范围内对\ GCH方程的实际鞍形平衡点进行\\多点数值测试,并确保\由这些鞍形点锚定的同斜度和\ +斜方轨道的多无限级数解的同时/收敛性和连续性。与大多数未加速的收敛\ udseries不同,使用相对较少的项即可获得较高的精度。我们还显示了\ thethesepulse脉冲的行波性质以及GCH NLPDE的前置解。

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