59. Let B be a *k* *k* matrix and A be a *k* *n* matrix.
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59. Let B be a *k* × *k* matrix and A be a *k* × *n* matrix. Show that A'BA is an idem-
potent matrix if BAA' is an idempotent matrix.
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Related Book For 
Matrices With Applications In Statistics
ISBN: 9780534980382
2nd Edition
Authors: Franklin A Graybill
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