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Take a feature vector, fv=fv u fv m of SVD, let fv(t) = t*v (this is for the line search of SVD).

Take a feature vector, fv=fv u fv m of SVD, let fv(t) = t*v (this is for the line search of SVD). So t=0 is one solution. The other two involve solving the quadratic equation,. ? (v,m)?Ratings t 2 fv u 2 fv 2 m =. ? (v,m)?Ratings fv u fv m r u,m. ? (v,m)?Ratings p um r u,m.

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