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1 | Review of methods, allowing to increase the efficiency of linear systems solving by iterative methods is given. Method of matrix-vector multiplication with use of fast Fourier transform (FFT) and Schenhage-Schtrassen method, accelerating large linear systems solving are presented. Results of comparison of matrix-vector multi¬plication with FFT use and of traditional method of ma¬trix-vector multiplication are shown. | 972 |