## Abstract For certain unbounded domains the Laplace operator with Dirichlet condition is shown to have an unbounded sequence of eigenvalues which are embedded into the essential spectrum. A typical example of such a domain is a locally perturbed cylinder with circular crossโsection whose diameter
On the Laplacian vector fields theory in domains with rectifiable boundary
โ Scribed by R. Abreu-Blaya; J. Bory-Reyes; M. Shapiro
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 195 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0170-4214
- DOI
- 10.1002/mma.758
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โฆ Synopsis
Abstract
Given a domain ฮฉ in โ^3^ with rectifiable boundary, we consider main integral, and some other, theorems for the theory of Laplacian (sometimes called solenoidal and irrotational, or harmonic) vector fields paying a special attention to the problem of decomposing a continuous vector field, with an additional condition, u on the boundary ฮof ฮฉ โ โ^3^ into a sum u = u^+^+u^โ^ were u^ยฑ^ are boundary values of vector fields which are Laplacian in ฮฉ and its complement respectively. Our proofs are based on the intimate relations between Laplacian vector fields theory and quaternionic analysis for the MoisilโTheodorescu operator. Copyright ยฉ 2006 John Wiley & Sons, Ltd.
๐ SIMILAR VOLUMES
In this paper we deal with the homogenization problem for the Poisson equation in a singularly perturbed domain with multilevel periodically oscillating boundary. This domain consists of the body, a large number of thin cylinders joining to the body through the thin transmission zone with rapidly os
## Abstract We obtain the __L__~__p__~โ__L__~__q__~ maximal regularity of the Stokes equations with Robin boundary condition in a bounded domain in โ^__n__^ (__n__โฉพ2). The Robin condition consists of two conditions: __v__ โ __u__=0 and ฮฑ__u__+ฮฒ(__T__(__u__, __p__)__v__ โ ใ__T__(__u__, __p__)__v__,
## Abstract We give a generalization of an algebraic formula of GomezโMont for the index of a vector field with isolated zero in (โ^__n__^, 0) and tangent to an isolated hypersurface singularity. We only assume that the vector field has an isolated zero on the singularity here.