The higher-order modified Korteweg-de Vries equation:Its soliton,breather and approximate solutions  

作　　者：Daniel Ntiamoah William Ofori-Atta Lanre Akinyemi 

机构地区：[1]Department of Mathematics,Ohio University,Athens,Ohio,USA [2]Department of Mathematics,Lafayette College,Easton,Pennsylvania,USA

出　　处：《Journal of Ocean Engineering and Science》2024年第6期554-565,共12页海洋工程与科学（英文）

摘　　要：In this study,the fifth-order modified Korteweg-de Vries(F-MKdV)equation is first addressed using Hi-rota’s bilinear method.Thereafter,the exact and approximative solutions of the generalized form of the F-MKdV equation are investigated using the modified Kudryashov method,the Riccati equation and its Backlund transformation method,the solitary wave ansatz method,and the homotopy perturbation trans-form method(HPTM).As a result,solitons,breather,and solitary wave solutions are derived from these methods.In particular,we obtain some new solutions such as the dark soliton,bright soliton,singular soliton,periodic trigonometric,exponential,hyperbolic,and rational solutions.The constraint conditions associated with the resulting solutions are also discussed in detail.The HPTM is employed to construct approximate solutions to the aforementioned generalized model due to its strong nonlinear terms and only a few terms are required to obtain accurate solutions.These findings may help to understand com-plex nonlinear phenomena.

关 键 词：F-MKdV equation Modified Kudryashov method Hirota’s bilinear method HPTM Laplace transform Riccati equation and its Backlund transformation 

分 类 号：O175[理学—数学]