Parallel Computational Technologies by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9783030553265
Publisher: Springer International Publishing

After that, the vectors , are calculated by the Chebyshev acceleration in the next restart period, and the new coefficient vector is defined by the LSM procedure (9)–(10), and so on.

3.3 The Second Acceleration Level of the Restarted Chebyshev or SCR Iterations

In this subsection, we describe the construction of an upper acceleration level for the restarted iterative processes, both for the Chebyshev and SCR algorithms. Let us have, after l restarts, some vectors and the corresponding residuals . Then we can define the improved vectors

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