Circulant matrix

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Science and technology

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What Wikipedia says

In linear algebra, a circulant matrix is a square matrix in which each row is a cyclic shift, by one position, of the row above it. Equivalently, its entries depend only on the difference of the row and column indices modulo the matrix size: if rows and columns are indexed from

Excerpt from the Wikipedia article “Circulant matrix”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Quartl, CC BY-SA 3.0, via Wikimedia Commons.