Transformations of n-Space, n ≥ 4
By a transformation of 4-space, we mean a rule T which assigns to each vector X of ℝ4 some vector T(X) of ℝ4. The vector T(X) is called the image of X under T, and the collection of all images of vectors in ℝ4 under the transformation T is called the range of T. We continue to denote transformations by capital letters such as P, Q, R, S, T.
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