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On Bogovskii and regularized Poincaré integral operators for
de Rham complexes on Lipschitz domains.

*Martin Costabel, Alan McIntosh*
*Math. Z. * **265**(2) (2010) 297 - 320

Published online: 5/05/2009,
DOI 10.1007/s00209-009-0517-8

Prépublication 08-40
* Université de Rennes 1* (2008)

We study integral operators related to a regularized version of the classical Poincaré path integral and the adjoint class generalizing Bogovskii's integral operator, acting on differential forms in R^n. We prove that these operators are pseudodifferential operators of order -1. The Poincaré-type operators map polynomials to polynomials and can have applications in finite element analysis.

For a domain starlike with respect to a ball, the special support properties of the operators imply regularity for the de Rham complex without boundary conditions (using Poincaré-type operators) and with full Dirichlet boundary conditions (using Bogovskii-type operators). For bounded Lipschitz domains, the same regularity results hold, and in addition we show that the cohomology spaces can always be represented by C^\infty functions.

pdf (260 k)

HAL: hal-00311594

arXiv:0808.2614v2

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