(a) Prove that if A is invertible and BA = CA, then B=C. (b) Give a counterexample to show that the result in part (a) may fail if A is not invertible.
(a) Prove that if A is invertible and BA = CA, then B=C. (b) Give a counterexample to show that the result in part (a) may fail if A is not invertible.
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter5: Orthogonality
Section5.3: The Gram-schmidt Process And The Qr Factorization
Problem 20EQ
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(a) Prove that if A is invertible and BA = CA, then B=C.
(b) Give a counterexample to show that the result in part (a) may fail if A is not invertible.
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