In the last years much progress has been achieved concerning the problem of determining the stability/instability of Stokes waves, i.e. periodic traveling solutions of the pure gravity water waves equations in an ocean of depth , subject to longitudinal perturbations. In this talk we review some of these results focusing the attention on the existence of unstable spectral bands away from zero for Stokes waves of small amplitude . In [11] we prove that the unstable spectrum is the union of “isolas” of approximately elliptical shape, parameterized by integers , with semiaxis of size where is a nonzero analytic function of the depth that depends on the Taylor coefficients of the Stokes waves up to order .
@article{SLSEDP_2023-2024____A3_0, author = {Massimiliano Berti}, title = {Stable and unstable {Stokes} waves}, journal = {S\'eminaire Laurent Schwartz {\textemdash} EDP et applications}, note = {talk:19}, pages = {1--14}, publisher = {Institut des hautes \'etudes scientifiques & Centre de math\'ematiques Laurent Schwartz, \'Ecole polytechnique}, year = {2023-2024}, doi = {10.5802/slsedp.166}, language = {en}, url = {https://proceedings.centre-mersenne.org/articles/10.5802/slsedp.166/} }
TY - JOUR AU - Massimiliano Berti TI - Stable and unstable Stokes waves JO - Séminaire Laurent Schwartz — EDP et applications N1 - talk:19 PY - 2023-2024 SP - 1 EP - 14 PB - Institut des hautes études scientifiques & Centre de mathématiques Laurent Schwartz, École polytechnique UR - https://proceedings.centre-mersenne.org/articles/10.5802/slsedp.166/ DO - 10.5802/slsedp.166 LA - en ID - SLSEDP_2023-2024____A3_0 ER -
%0 Journal Article %A Massimiliano Berti %T Stable and unstable Stokes waves %J Séminaire Laurent Schwartz — EDP et applications %Z talk:19 %D 2023-2024 %P 1-14 %I Institut des hautes études scientifiques & Centre de mathématiques Laurent Schwartz, École polytechnique %U https://proceedings.centre-mersenne.org/articles/10.5802/slsedp.166/ %R 10.5802/slsedp.166 %G en %F SLSEDP_2023-2024____A3_0
Massimiliano Berti. Stable and unstable Stokes waves. Séminaire Laurent Schwartz — EDP et applications (2023-2024), Exposé no. 19, 14 p. doi : 10.5802/slsedp.166. https://proceedings.centre-mersenne.org/articles/10.5802/slsedp.166/
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