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Long-time asymptotics for the Elastic Beam equation in the solitonless region via bar{partial} methods

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arxiv 2309.03230 v1 pith:OXUTE5VK submitted 2023-09-05 math.AP nlin.SI

Long-time asymptotics for the Elastic Beam equation in the solitonless region via bar{partial} methods

classification math.AP nlin.SI
keywords beamelasticequationpartialdescentlong-timemethodproblem
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In this work, we study the Cauchy problem of the Elastic Beam equation with initial value in weighted Sobolev space $H^{1,1}(\mathbb{R})$ via the $\bar{\partial}$-steepset descent method. Begin with the Lax pair of the Elastic Beam equation, we successfully derive the basic Riemann-Hilbert problem, which can be used to represent the solutions of the Elastic Beam equation. Then, considering the solitonless region and using the $\bar{\partial}$-steepset descent method, we analyse the long-time asymptotic behaviors of the solutions for the Elastic Beam equation.

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