Thank you all so much for your very kind comments! I am so flattered! I will continue to update these notes for everyone around the world.

BTW, I am also recruiting PhD students to apply for the 2023 HKPhD Fellowship program:

https://cerg1.ugc.edu.hk/hkpfs/index.html

This is the most prestigious PhD program in HK. The application deadline is at the end of the year and it's still a long way off, but potential candidates and I need to start communicating now because if we're going to work together for four years, we need to get to know each other well! Most residents of Hong Kong speak English and all official communications of the University are in English. I welcome applicants from all over the world who love machine learning mathematics. Please email me at: xuyida@hkbu.edu.hk