Hippocampus's Garden

How come ROC-AUC is equal to the probability of a positive sample ranked higher than negative ones? This post provides an answer with a fun example.

Causal inference is becoming a hot topic in ML community. This post formulates one of its important concepts called doubly robust estimator with simple notations.

『統計のための行列代数』のまとめと感想です．末尾に誤植と思われる箇所を挙げています．

How does Google's PageRank work? Its theory and algorithm are explained, followed by numerical experiments.