Hi — I’m Jiahao Wu. This is my corner for notes and writing.

• 2026/08/10 From three integers to a ranker
• 2026/08/09 Viewer-conditioned social ranking
• 2026/08/08 Part III: Viewer-conditioned projection at billion scale
• 2026/08/07 Part II: How to tell whether your recommendation problem is low-rank
• 2026/08/05 Part I: Item recommendation is bipartite. Social recommendation isn’t.