r****y
发帖数: 1437 | 1
Maybe this one works
By SVD,
A = UTV'
A*A' = UTTU'
A'*A = VTTV'
So Inv(A*A') = UT**(-2)U'
Inv(A'*A) = VT**(-2)V'
Once you figure out U and V by standard SVD routine,
Inv(A*A') = UV'Inv(A'*A)VU'
But actually if you figure out UTV, can invert it directly. :-) |
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