Referring to A and B in 8, show that the mapping A, B = a11b11 + a12b12 + a21b21 +
Chapter 5, Problem 11(choose chapter or problem)
Referring to A and B in 8, show that the mapping A, B = a11b11 + a12b12 + a21b21 + a22b22 (5.1.13) defines a valid inner product in M2(R).
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