Abstract
According to the N-soliton solution derived from Hirota’s bilinear method, higher-order smooth positons and breather positons are obtained efficiently through an ingenious limit approach. This paper takes the Sine-Gordon equation as an example to introduce how to utilize this technique to generate these higher-order smooth positons and breather positons in detail. The dynamical behaviors of smooth positons and breather positons are presented by some figures. During the procedure of deduction, the approach mentioned has the strengths of concision and celerity. In terms of feasibility and practicability, this approach can be exploited widely to study higher-order smooth positons and breather positons of other integrable systems.
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