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Block matrices with a special structure arise from mixed finite element discretizations of incompressible flow problems. This paper is concerned with an analysis of the eigenvalue problem for such matrices and the derivation of two shifted eigenvalue problems that are more suited to numerical solution by iterative algorithms like simultaneous iteration and(More)
This paper is concerned with the relationship between the eigenvalues computed by a generalisation of the standard Arnoldi's method applied to certain preconditionings of the eigenvalue problem Aw = Bw, where B is symmetric positive semideenite. The matrices in the eigenvalue problem have a special block structure which arises after a mixed Finite Element(More)
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