A posteriori error estimates for a fully discrete approximation of Sobolev equations
Confluentes Mathematici, Volume 11 (2019) no. 1, p. 3-28

The paper presents an a posteriori error estimator for a (piecewise linear) conforming finite element approximation of some (linear) Sobolev equations in d , d=2 or 3, using implicit Euler’s scheme. For this discretization, we derive a residual indicator, which uses a spatial residual indicator based on the jumps of conormal derivatives of the approximations and a time residual indicator based on the jump (in an appropriated norm) of the successive solutions at each time step. Lower and upper bounds are obtained with minimal assumptions on the meshes. Numerical experiments that confirm and illustrate the theoretical results are given.

Received : 2018-05-22
Revised : 2019-01-14
Accepted : 2019-05-29
Published online : 2019-08-28
DOI : https://doi.org/10.5802/cml.53
Classification:  65M15,  65M50,  65M60
Keywords: Sobolev equations, a posteriori error analysis
@article{CML_2019__11_1_3_0,
     author = {Serge Nicaise and Fatiha Bekkouche},
     title = {A posteriori error estimates for a fully discrete approximation of Sobolev equations},
     journal = {Confluentes Mathematici},
     publisher = {Institut Camille Jordan},
     volume = {11},
     number = {1},
     year = {2019},
     pages = {3-28},
     doi = {10.5802/cml.53},
     language = {en},
     url = {https://cml.centre-mersenne.org/item/CML_2019__11_1_3_0}
}
Nicaise, Serge; Bekkouche, Fatiha. A posteriori error estimates for a fully discrete approximation of Sobolev equations. Confluentes Mathematici, Volume 11 (2019) no. 1, pp. 3-28. doi : 10.5802/cml.53. https://cml.centre-mersenne.org/item/CML_2019__11_1_3_0/

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