A posteriori error estimates for elliptic problems with Dirac measure terms in weighted spaces
Agnelli, Juan Pablo ; Garau, Eduardo M. ; Morin, Pedro
ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 48 (2014), p. 1557-1581 / Harvested from Numdam
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In this article we develop a posteriori error estimates for second order linear elliptic problems with point sources in two- and three-dimensional domains. We prove a global upper bound and a local lower bound for the error measured in a weighted Sobolev space. The weight considered is a (positive) power of the distance to the support of the Dirac delta source term, and belongs to the Muckenhoupt's class A2. The theory hinges on local approximation properties of either Clément or Scott-Zhang interpolation operators, without need of modifications, and makes use of weighted estimates for fractional integrals and maximal functions. Numerical experiments with an adaptive algorithm yield optimal meshes and very good effectivity indices.

Publié le : 2014-01-01
DOI : https://doi.org/10.1051/m2an/2014010
Classification:  35J15,  65N12,  65N15,  65N30,  65N50,  65Y20 
@article{M2AN_2014__48_6_1557_0,
     author = {Agnelli, Juan Pablo and Garau, Eduardo M. and Morin, Pedro},
     title = {A posteriori error estimates for elliptic problems with Dirac measure terms in weighted spaces},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique},
     volume = {48},
     year = {2014},
     pages = {1557-1581},
     doi = {10.1051/m2an/2014010},
     language = {en},
     url = {http://dml.mathdoc.fr/item/M2AN_2014__48_6_1557_0}
}

Agnelli, Juan Pablo; Garau, Eduardo M.; Morin, Pedro. A posteriori error estimates for elliptic problems with Dirac measure terms in weighted spaces. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 48 (2014) pp. 1557-1581. doi : 10.1051/m2an/2014010. http://gdmltest.u-ga.fr/item/M2AN_2014__48_6_1557_0/

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