Abstract
Circulant preconditioners for Hermitian Toeplitz systems are studied by R. Chan and Yeung from the viewpoint of kernels. They show that some well-known circulant preconditioners can be derived from convoluting the generating functions of systems with some famous kernels. A convergence analysis is also given there. In this paper, we generalize the results of R. Chan and Yeung from the point matrix case to the block matrix case.
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