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Message-ID: <20050831213746.66597.qmail@web54515.mail.yahoo.com> Date: 2005-08-31T21:37:46Z From: Globe Trotter Subject: eigen-decomposition of symmetric BCCB matrices Hi, Can anyone please point to how to decompose BCCB (Block-Circulant-Circulant-Block) matrices? I am interested in the derivations: I do know that this can be numerically done using 2-dimensional FFTs. Many thanks and best wishes!