Abstract
We consider the Stokes and Navier--Stokes equations with boundary conditions
of Dirichlet type on the velocity on one part of the boundary and involving the pressure on the rest of the boundary. We write the variational formulations of such problems. Next we propose a nite element discretization of them and perform the a priori and a posteriori analysis of the discrete problem. Some numerical experiments conrm the interest of this discretization.
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