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The method is fully-explicit and it has fourth order accuracy in time and spectral accuracy in space. We rigorously carry out error analysis and establish error bounds in the Sobolev spaces. The performance of the EWI-SP method is illustrated by examining the long-time evolution of the single solitary wave, single wave splitting, and head-on collision of solitary waves. Numerical experiments confirm the theoretical results.<\/jats:p>","DOI":"10.1007\/s11075-024-01763-6","type":"journal-article","created":{"date-parts":[[2024,1,25]],"date-time":"2024-01-25T13:50:43Z","timestamp":1706190643000},"page":"1583-1606","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Error analysis of the exponential wave integrator sine pseudo-spectral method for the higher-order Boussinesq equation"],"prefix":"10.1007","volume":"97","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-1699-5027","authenticated-orcid":false,"given":"Melih Cem","family":"Canak","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2268-3992","authenticated-orcid":false,"given":"Gulcin M.","family":"Muslu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,1,25]]},"reference":[{"issue":"5","key":"1763_CR1","doi-asserted-by":"publisher","first-page":"1028","DOI":"10.1143\/PTP.79.1028","volume":"79","author":"P Rosenau","year":"1988","unstructured":"Rosenau, P.: Dynamics of dense discrete systems: high order effects. 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