Using Frames of Subspaces in Galerkin and Richardson Methods for Solving Operator Equations

Document Type : Research Paper

Authors

Department of Mathematics‎, ‎Faculty of Mathematics and computer Sciences‎, ‎Vali-e-Asr‎ ‎University of Rasanjan‎, ‎Rafsanjan‎, ‎Iran‎.

Abstract


‎In this paper‎, ‎two iterative methods are constructed to solve the operator equation $ Lu=f $ where $ L:H\rightarrow H $ is a bounded‎, ‎invertible and self-adjoint linear operator on a separable Hilbert space $ H $‎. ‎By using the concept of frames of subspaces‎, ‎which is a generalization of frame theory‎, ‎we design some algorithms based on Galerkin and Richardson methods‎, ‎and then we investigate the convergence and optimality of them‎.

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