= tr (ATB) for any 2x2 real matrices A and B.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter5: Factoring Polynomials
Section5.12: Solving Equations By Factoring
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Let V = {

a b
c d

: a,b,c,d ∈ R} be the vector space of 2x2 real matrices endowed with the inner product:  <A, B> = tr (ATB) for any 2x2 real matrices A and B. Let


a.) Prove that S is an orthogonal set.
b.) Is S an orthogonal set. 
c.) Find an orthogonal basis for V containing set S.
d.) Using the result in c.), find an orthogonal basis for V.  


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