Now I am a third-year undergraduate student. (Oct 2024)

I attended my first algebraic topology lecture on 10th Oct 2024. So far it's basically a revision of what I learned on my own.

Old profile (Oct 2023):

Hi. I'm a second-year undergraduate student studying mathematics at University of Cambridge. I have been self-studying algebraic topology using various resources including this site.

Other interests: music (especially pieces by Sergei Rachmaninoff, Alexander Scriabin, and Samuil Feinberg). (Yes I play piano)

Some of my questions/answers (posted before October 2022) were written when I was still a high school student trying to self-study real analysis and basic topology. Those posts might contain elementary mathematical mistakes and/or elementary grammatical mistakes (as English is not my first language).