Matrix Factorization and Latent Semantic Indexing Background Example continued Let's divide U(and multiply U-1)by 2 Then, s= Q (Q=Q) Why? Stay tunedMatrix Factorization and Latent Semantic Indexing 13 Example continued Let’s divide U (and multiply U–1) by 2       −             − 1/21/2 1/21/2 03 10 1/21/2 Then, S= 1/21/2 Q (Q-1= QT  ) Why? Stay tuned … Background