dm.cs.tu-dortmund.de/mlbits/topic-modeling-lda-variational-inference/
Variational Inference for LDA – Lecture Notes
P(x,z) \frac{Q(z)}{Q(z)}\right] = \log E_Q\left[\frac{P(x,z)}{Q(z)}\right] \\ & \textcolor[RGB]{193,0,37}{{}\geq {}}E_Q[\log P(x,z)] - \underbrace{E_Q[\log Q(z)]}_{\text{Entropy of }Q} = \mathcal{L}(Z) …
