J. Baranger et al., APPLICATION OF MIXED FINITE-ELEMENT THEOR Y TO THE STUDY OF A CLASS OF FINITE DIFFERENCE-VOLUME SCHEMES FOR ELLIPTIC PROBLEMS, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 319(4), 1994, pp. 401-404
We consider the dual mixed formulation of the Dirichlet problem. We sh
ow that all appropriate numerical integration allows to eliminate grad
ient variable. In this fashion we explicitly get a scheme in which the
only unknows are the initial ones and which can be understood as a Fi
nite Volume one. Mixed Finite Element techniques can be used to obtain
error estimations for some Finite Volume schemes.