Summary. In this paper, we analyse a stabilisation technique for the so-called three-field formulation for nonoverlapping domain decomposition methods. The stabilisation is based on boundary bubble functions in each subdomain which are then eliminated by static condensation. The discretisation grids in the subdomains can be chosen independently as well as the grid for the final interface problem. We present the analysis of the method and we construct a set of bubble functions which guarantees the optimal rate of convergence.
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Received May 12, 1998 / Revised version received November 21, 2000 / Published online June 7, 2001
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Buffa, A. Error estimate for a stabilised domain decomposition method with nonmatching grids. Numer. Math. 90, 617–640 (2002). https://doi.org/10.1007/s002110100298
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DOI: https://doi.org/10.1007/s002110100298