Superconvergence of finite element approximations to eigenspaces
The results of the author [ibid. 30, No. 7, 1230-1238 (1994; Zbl 0852.65093)] concerning the superconvergence of the finite element approximation of eigenfunctions are generalized to the case of multiple eigenvalues.
scientific article; zbMATH DE number 1916097
scientific article