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Polar and singular value decomposition of $3\times 3$ magic squares. (English)
Int. J. Math. Educ. Sci. Technol. 44, No. 5, 774-777 (2013).
Summary: In this note, we find polar as well as singular value decompositions of a $3\times 3$ magic square, i.e. a $3\times 3$ matrix $M$ with real elements where each row, column and diagonal adds up to the magic sum $s$ of the magic square.
Classification: K20 H60