CENTER FOR COMPUTATIONAL MATHEMATICS COLLOQUIUM

                  UNIVERSITY OF COLORADO AT DENVER



TITLE:   Necessary and sufficient conditions of well-posedness of a
              mixed formulation of symmetric problems
 

SPEAKER: Andrew Knyazev, Department of Mathematics, 
         University of Colorado at Denver

         
DATE:    Monday, October 6, 1997  


PLACE:   Math Conference Room 626 
         UCD Building, 1250 14th St., Denver


TIME:    noon (Refreshments served at 11:45 am) 



ABSTRACT


We consider a standard mixed formulation of a symmetric problem 
                                         Au+B*p=0
                                          B(u-g)=0
We derive necessary and sufficient conditions of wellposedness. As an
application, we consider a Hellinger-Reissner formulation of nonhomogeneous
Lame equations for media with (almost) rigid inclusions. The (almost)
incompressible case is covered as well.