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• W2892926863 abstract "The existence of right inverses of the divergence as an operator from H10(Ω)n to L20(Ω) is a problem that has been widely studied because of its importance in the analysis of the classic equations of fluid dynamics. When Ω is a bounded domain which is star-shaped with respect to a ball B, a right inverse given by an integral operator was introduced by Bogovskii, who also proved its continuity using the Calderon-Zygmund theory of singular integrals.In this paper we give an alternative elementary proof of the continuity using the Fourier transform. As a consequence, we obtain estimates for the constant in the continuity in terms of the ratio between the diameter of Ω and that of B. Moreover, using the relation between the existence of right inverses of the divergence with the Korn and improved Poincare inequalities, we obtain estimates for the constants in these two inequalities. We also show that one can proceed in the opposite way, that is, the existence of a continuous right inverse of the divergence, as well as estimates for the constant in that continuity, can be obtained from the improved Poincare inequality. We give an interesting example of this situation in the case of convex domains." @default.
• W2892926863 created "2018-10-05" @default.
• W2892926863 creator A5011709693 @default.
• W2892926863 date "2012-03-01" @default.
• W2892926863 modified "2023-09-24" @default.
• W2892926863 title "An elementary proof of the continuity from L20(Ω) to H10(Ω)n of Bogovskii’s right inverse of the divergence" @default.
• W2892926863 hasPublicationYear "2012" @default.
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