Here I store some notes. I prepared these notes to help myself understand certain topics, for presentation at seminars, or recording half-baked research ideas. They have not been checked thoroughly and certainly contain typos and errors to taste.

Descriptive Set Theory

Set Theory

Teaching Materials

Writings in Chinese (中文笔记)

描述集合论 (Descriptive Set Theory)

集合论/一般数学 (Set Theory/General Mathematics)

历史 (History)

哲学 (Philosophy)

教学与科普 (Teaching Materials/For General Public)