hunglv51

The noise is added by using dropout. I think the L2 normalization is used to normalize feedback data for solve accommodating user or fastidious user problem.

Here 's what I think, It 's from the problem you will face with explicit feedback: for example, accommodating users rate 3/5 star for item they don't like and 5/5...

In [VAE CF paper](https://arxiv.org/pdf/1802.05814.pdf), the Gaussian log likelihood (Eq 3) contains confidence weight c_ui but not in the Multinomial log likelihood (Eq 2). Can you explain why multinomial doesn't need...