Maximum-norm resolvent estimates for elliptic finite element operators on nonquasiuniform triangulations
Bakaev, Nikolai Yu. ; Crouzeix, Michel1 ; Thomée, Vidar
1 Université de Rennes 1 IRMAR, UMR 6625 Campus de Beaulieu 35042 Rennes Cedex FRANCE
ESAIM: Modélisation mathématique et analyse numérique, Tome 40 (2006) no. 5, pp. 923-937.

In recent years several papers have been devoted to stability and smoothing properties in maximum-norm of finite element discretizations of parabolic problems. Using the theory of analytic semigroups it has been possible to rephrase such properties as bounds for the resolvent of the associated discrete elliptic operator. In all these cases the triangulations of the spatial domain has been assumed to be quasiuniform. In the present paper we show a resolvent estimate, in one and two space dimensions, under weaker conditions on the triangulations than quasiuniformity. In the two-dimensional case, the bound for the resolvent contains a logarithmic factor.

DOI : 10.1051/m2an:2006040
Classification : 65M06, 65M12, 65M60
Mots-clés : resolvent estimates, stability, smoothing, maximum-norm, elliptic, parabolic, finite elements, nonquasiuniform triangulations
Bakaev, Nikolai Yu.  ; Crouzeix, Michel 1 ; Thomée, Vidar 

1 Université de Rennes 1 IRMAR, UMR 6625 Campus de Beaulieu 35042 Rennes Cedex FRANCE 
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Bakaev, Nikolai Yu.; Crouzeix, Michel; Thomée, Vidar. Maximum-norm resolvent estimates for elliptic finite element operators on nonquasiuniform triangulations. ESAIM: Modélisation mathématique et analyse numérique, Tome 40 (2006) no. 5, pp. 923-937. doi : 10.1051/m2an:2006040. http://www.numdam.org/articles/10.1051/m2an:2006040/

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