Smf. Garcia et S. Jensen, THE P-VERSION OF MIXED FINITE-ELEMENT METHODS FOR PARABOLIC PROBLEMS, Modelisation mathematique et analyse numerique, 31(3), 1997, pp. 303-326
We investigate a parabolic problem from the point of view of stability
and approximation properties of increasing order mixed (in space) fin
ite element methods. Previous estimates for the Raviart-Thomas project
ion are proven to be sharp. We analyze the effects of mixed finite ele
ment discretization in space to present transient error estimates (for
semidiscrete mixed finite element methods). The results in this paper
(submitted in Oct. 1993) complement the results already published in
[6-8].