Hi. I'm Kevin. I finished my undergraduate study in July 2025. Now I'm a master student at Universität Bonn studying mathematics. (Oct 2025)

Other interests: music (I quite enjoy playing pieces by Sergei Rachmaninoff, Alexander Scriabin, and Samuil Feinberg).

Some of my questions/answers (posted before October 2022) were written when I was in school. Those posts (certainly) contain elementary mathematical mistakes and/or elementary grammatical mistakes.