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5.3 ORTHOGONAL TRANSFORMATIONS AND ORTHOGONAL …

A linear transformation T from Rn to Rn is called orthogonal if it preserves the length of vectors: kT(~x)k = k~xk, for all ~x in Rn. If T(~x) = A~x is an orthogonal transformation, we say that A is an orthogonal matrix. 1

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