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Tiago de Freitas Pereira authored
Implemented the signal standarization. The signs of U and V is defined analysing the first element of U. If U[0, 0] < 0 then U=-1*U and V=-1*V With that we have a consistent SVD binds along different implementations (http://prod.sandia.gov/techlib/access-control.cgi/2007/076422.pdf)
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