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4. Show that for Wnxk = XnxkBkxk with X full rank, P = X(XTX)XT remains unchanged if X is replaced by W. Thus, P
4. Show that for Wnxk = XnxkBkxk with X full rank, P = X(XTX)XT remains unchanged if X is replaced by W. Thus, P is a function of the subspace C(X), and not of the particular basis chosen for this subspace.
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Discrete Mathematics and Its Applications
Authors: Kenneth H. Rosen
7th edition
0073383090, 978-0073383095
