Global Solutions to the Two Dimensional Quasi-Geostrophic Equation with Critical or Super-Critical Dissipation |
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Authors: | Ning Ju |
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Affiliation: | (1) Department of Mathematics, Oklahoma State University, 401 Mathematical Sciences, Stillwater, OK 74078, USA |
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Abstract: | The two dimensional quasi-geostrophic (2D QG) equation with critical and super-critical dissipation is studied in Sobolev space Hs(ℝ2). For critical case (α=), existence of global (large) solutions in Hs is proved for s≥ when is small. This generalizes and improves the results of Constantin, D. Cordoba and Wu [4] for s = 1, 2 and the result of A. Cordoba and D. Cordoba [8] for s=. For s≥1, these solutions are also unique. The improvement for pushing s down from 1 to is somewhat surprising and unexpected. For super-critical case (α ∈ (0,)), existence and uniqueness of global (large) solution in Hs is proved when the product is small for suitable s≥2−2α, p ∈ [1,∞] and β ∈ (0,1]. |
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Keywords: | Two dimensional dissipative quasi-geostrophic equations Existence Uniqueness Critical Super-critical Sobolev space |
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