A ribbon knot which is not a symmetric union
김수현
129동 406호
0
3766
06.01 11:06
| 구분 | 기하위상,위상수학 |
|---|---|
| 일정 | 2026-06-23(화) 10:30~12:30 |
| 세미나실 | 129동 406호 |
| 강연자 | Teruaki Kitano (Soka University) |
| 담당교수 | 기타 |
| 기타 |
A basic open question motivated by the study of ribbon knot diagrams asks whether every ribbon knot can be presented as a symmetric union. This appears as Problem 1.51 in “The New Kirby’s Problem List.” In this talk, we give a negative answer to this question by exhibiting a ribbon Montesinos knot that does not admit a symmetric union presentation.
This is a joint work with Michel Boileau (Aix-Marseille University) and Yuta Nozaki (Hokkaido University).
※ 김혁 교수님 주관
