Intermediate long wave equation in negative Sobolev spaces
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866910423642537984 |
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| author | Chapouto, Andreia Forlano, Justin Li, Guopeng Oh, Tadahiro Pilod, Didier |
| author_facet | Chapouto, Andreia Forlano, Justin Li, Guopeng Oh, Tadahiro Pilod, Didier |
| contents | We study the intermediate long wave equation (ILW) in negative Sobolev spaces. In particular, despite the lack of scaling invariance, we identify the regularity $s = -\frac 12$ as the critical regularity for ILW with any depth parameter, by establishing the following two results. (i) By viewing ILW as a perturbation of the Benjamin-Ono equation (BO) and exploiting the complete integrability of BO, we establish a global-in-time a priori bound on the $H^s$-norm of a solution to ILW for $ - \frac 12 < s < 0$. (ii) By making use of explicit solutions, we prove that ILW is ill-posed in $H^s$ for $s < - \frac 12$. Our results apply to both the real line case and the periodic case. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_08142 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Intermediate long wave equation in negative Sobolev spaces Chapouto, Andreia Forlano, Justin Li, Guopeng Oh, Tadahiro Pilod, Didier Analysis of PDEs 35Q35, 37K10, 76B55 We study the intermediate long wave equation (ILW) in negative Sobolev spaces. In particular, despite the lack of scaling invariance, we identify the regularity $s = -\frac 12$ as the critical regularity for ILW with any depth parameter, by establishing the following two results. (i) By viewing ILW as a perturbation of the Benjamin-Ono equation (BO) and exploiting the complete integrability of BO, we establish a global-in-time a priori bound on the $H^s$-norm of a solution to ILW for $ - \frac 12 < s < 0$. (ii) By making use of explicit solutions, we prove that ILW is ill-posed in $H^s$ for $s < - \frac 12$. Our results apply to both the real line case and the periodic case. |
| title | Intermediate long wave equation in negative Sobolev spaces |
| topic | Analysis of PDEs 35Q35, 37K10, 76B55 |
| url | https://arxiv.org/abs/2311.08142 |