| Factorization |
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| W = R2F3 S3P |
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| SVD |
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| W = U Λ V Λ must be rank 3 |
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| W’ = (U Λ 1/2)(Λ1/2
V) = U’
V’ |
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| Make R orthogonal |
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| R = QU’ ,
S = Q-1V’ |
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| ifTQTQif
= 1 … |
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