We consider a family of quadrilateral or hexahedral mixed -finite elements for an incompressible flow problem with -elements for the velocity and discontinuous -elements for the pressure where the order can vary from element to element between and an arbitrary bound. For multilevel adaptive grids with hanging nodes and a sufficiently small mesh size, we prove the inf-sup condition uniformly with respect to the mesh size and the polynomial degree.
@article{M2AN_2008__42_3_493_0, author = {Schieweck, Friedhelm}, title = {Uniformly stable mixed hp-finite elements on multilevel adaptive grids with hanging nodes}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique}, volume = {42}, year = {2008}, pages = {493-505}, doi = {10.1051/m2an:2008014}, mrnumber = {2423796}, zbl = {1154.76034}, language = {en}, url = {http://dml.mathdoc.fr/item/M2AN_2008__42_3_493_0} }
Schieweck, Friedhelm. Uniformly stable mixed hp-finite elements on multilevel adaptive grids with hanging nodes. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 42 (2008) pp. 493-505. doi : 10.1051/m2an:2008014. http://gdmltest.u-ga.fr/item/M2AN_2008__42_3_493_0/
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