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Abstract:

The existence of right inverses of the divergence as an operator from H 1 0 (Ω) n to L 2 0(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 Calderón-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 Poincaré 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 Poincaré inequality. We give an interesting example of this situation in the case of convex domains.

Registro:

Documento: Artículo
Título:An elementary proof of the continuity from L 2 0(Ω) to H 1 0 (Ω) n of bogovskii's right inverse of the divergence
Autor:Durán, R.G.
Filiación:Departamento de Matemática, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, and IMAS, CONICET, Buenos Aires, Argentina
Palabras clave:Divergence operator; Singular integrals; Stokes equations
Año:2012
Volumen:53
Número:2
Página de inicio:59
Página de fin:78
Título revista:Revista de la Union Matematica Argentina
Título revista abreviado:Rev. Union Mat. Argent.
ISSN:00416932
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00416932_v53_n2_p59_Duran

Referencias:

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Citas:

---------- APA ----------
(2012) . An elementary proof of the continuity from L 2 0(Ω) to H 1 0 (Ω) n of bogovskii's right inverse of the divergence. Revista de la Union Matematica Argentina, 53(2), 59-78.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00416932_v53_n2_p59_Duran [ ]
---------- CHICAGO ----------
Durán, R.G. "An elementary proof of the continuity from L 2 0(Ω) to H 1 0 (Ω) n of bogovskii's right inverse of the divergence" . Revista de la Union Matematica Argentina 53, no. 2 (2012) : 59-78.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00416932_v53_n2_p59_Duran [ ]
---------- MLA ----------
Durán, R.G. "An elementary proof of the continuity from L 2 0(Ω) to H 1 0 (Ω) n of bogovskii's right inverse of the divergence" . Revista de la Union Matematica Argentina, vol. 53, no. 2, 2012, pp. 59-78.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00416932_v53_n2_p59_Duran [ ]
---------- VANCOUVER ----------
Durán, R.G. An elementary proof of the continuity from L 2 0(Ω) to H 1 0 (Ω) n of bogovskii's right inverse of the divergence. Rev. Union Mat. Argent. 2012;53(2):59-78.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00416932_v53_n2_p59_Duran [ ]