50. Exhibit a 3 x 3 matrix A of rank 2 that has two roots equal to...
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50. Exhibit a 3 x 3 matrix A of rank 2 that has two roots equal to +1 and one root equal to zero such that A is not idempotent. This illustrates the fact that (1) of Theorem 12.3.2 is not a sufficient condition for A to be idempotent.
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Matrices With Applications In Statistics
ISBN: 9780534980382
2nd Edition
Authors: Franklin A Graybill
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