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QR-Decomposition for a 2x2 Matrix

Linear Algebra: We give a general formula for a QR-decomposition of a real 2x2 matrix; that is, we show how to decompose any 2x2 matrix A as a product QR where Q is orthogonal and R is upper triangular. We also note one set of conditions under which the factorization is unique.
Length: 10:33

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