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Excerpt from Circulant Preconditioners for Hermitian Toeplitz Systems Theorem 2. Let f be a positive function in the Wiener class, then [or all 6 0, there exist M and N 0 such that for all n N, at most M eigenvalues of C A have absolute values exceeding 5. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.