Resumen de Variational eigenvalue approximation of non-coercive operators with application to mixed formulations in elasticity
We present an abstract framework for the eigenvalue approximation of a class of noncoercive operators. We provide sufficient conditions to guarantee the spectral correctness of the Galerkin scheme and to obtain optimal rates of convergence. The theory is applied to the convergence analysis of mixed finite element approximations of the elasticity and Stokes eigensystems
