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行列の基本変形
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1. Elementary matrix​In mathematics, an elementary matrix is a matrix which differs from the identity matrix by one single elementary row operation. The elementary matrices generate the general linear group of invertible matrices. Left multiplication (pre-multiplication) by an elementary matrix represents elementary row operations, while right multiplication (post-multiplication) represents elementary column operations. In algebraic K-theory, "elementary matrices" refers only to the row-addition matrices.
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