I am a third year Ph.D. student and study set theory of reals. he/him.
Graduate School of System Informatics, Kobe University,
1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, JAPAN
E-mail: 202x603x (at) stu (dot) kobe-u (dot) ac (dot) jp
This is a mug printed Cichoń's diagram