(23.02.28)
선형대수 정리하기 5탄
Trace
least squares & projection matrix (최소자승법 & 정사영 행렬)
참고영상: https://www.youtube.com/watch?v=B_WZdmCGqBc&list=PL_iJu012NOxdZDxoGsYidMf2_bERIQaP0&index=19
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