Approximation of eigenvalues and a Koehler's type method
Un ricordo di Piero Villaggio
External approximation of first order variational problems estimates
Here we present an approximation method for a rather broad class of first order variational problems in spaces of piece-wise constant functions over triangulations of the base domain. The convergence of the method is based on an inequality involving norms obtained by Nečas and on the general framework of -convergence theory.
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