Analysis of a mixed finite element for the Stokes problem. I: General results (Q1203414)

The authors presents some variants of standard a priori error estimates for mixed finite element methods. In particular, these variants including dual estimates in the spirit of Aubin-Nitsche apply to a situation with more than two variables where the coerciveness assumption is much weaker than in the classical case and where the ``inclusion of kernels property'' is only partially satisfied.