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- 13:26, 30 June 2021 Mscroggs talk contribs created page Matrix indices (Created page with "It's common to write the entries of a matrix \(A\) as \(a_{ij}\) without a comma: \(A = \left(\begin{array}{cccc} a_{11}&a_{12}&\dots&a_{1n}\\ a_{21}&a_{22}&\dots&a_{nn}\\ \v...")