[其他] 矩陣

[superdevil (綠惡魔)]

http://i.imgur.com/eLjA3hp.jpg
看解答是在說正交矩陣啊！怎麼會是問對角矩陣呢？

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推 lovealgebra : 感覺像是問可否對角化吧
→ lovealgebra : Considerate A is orthogonal ->A is normal->there
→ lovealgebra :  exist an orthonormal basis with eigenvectors->A
→ lovealgebra :  is diagonalizable.