조회 수 603 추천 수 0 댓글 0
?

단축키

Prev이전 문서

Next다음 문서

크게 작게 위로 아래로 댓글로 가기 인쇄
?

단축키

Prev이전 문서

Next다음 문서

크게 작게 위로 아래로 댓글로 가기 인쇄
Extra Form
일정시작 2021-06-25
일정종료 2021-06-25
배경색상 #036eb7

Date: 6월24일 금요일, 2021년

Place: 129동


Title: Closed orbits and Beatty sequences

Speaker: 강정수 교수

Abstract:

A long-standing open question in Hamiltonian dynamics asks whether every strictly convex hypersurface in R^{2n} carries at least n closed orbits. This was answered affirmatively in the non-degenerate case by Long and Zhu in 2002. The aim of this talk is to outline their proof and to highlight its connection to partitioning the set positive integers.


 

Title: On the $\tilde{H}$-cobordism group of $S^1 \times S^2$'s

Speaker: 이동수 박사

Abstract:

Kawauchi defined a group structure on the set of homology S1 × S2’s under an equivalence relation called $\tidle{H}$-cobordism. This group receives a homomorphism from the knot concordance group, given by the operation of zero-surgery. In this talk, we review knot concordance invariants derived from knot Floer complex, and apply them to show that the kernel of the zero-surgery homomorphism contains an infinite rank subgroup generated by topologically slice knots.

 

 

 

 


List of Articles
번호 제목 글쓴이 날짜 조회 수
공지 QSMS Mailing List Registration qsms 2021.09.09 71
53 [QSMS Seminar 2021.07.02] Lefschetz fibrations on cotangent bundles qsms 2021.06.29 44101
52 [초청강연 2020.11.27] Zeta함수와 L함수에 대한 역사적 고찰II qsms 2020.11.23 30980
51 [SNU Number Theory Seminiar] 2021.10.08 qsms 2021.08.23 20261
50 [QSMS Monthly Seminar] Peterson conjecture via Lagrangian correspondences and wonderful compactifications qsms 2020.11.18 19575
49 [Seminar 05.14, 05.21, 05.28, 06.04] Introduction to derived categories qsms 2021.04.16 15478
48 [Seminar 2021.03.03] Zeta함수와 L함수에 대한 역사적 고찰X qsms 2021.03.02 8100
47 [Seminar 2021.04.02] Quantum affine analog of Kazhdan-Lusztig positivity for non-simply laced types via simply laced types qsms 2021.03.30 7077
46 [QSMS Monthly Seminar] Canonical basis qsms 2020.11.18 5565
45 [QSMS Monthly Seminar] Introduction to cluster algebras (and monoidal categorification) qsms 2020.11.18 5491
44 [Seminar 2021.04.16] Hecke system of harmonic Maass functions and applications to modular curves of higher genera qsms 2021.04.19 4637
43 [2021 KMS Spring Meeting] Related talks qsms 2021.04.30 3635
42 [초청강연 2020.11.20] Zeta함수와 L함수에 대한 역사적 고찰 qsms 2020.11.18 2758
41 [Seminar 2021.04.29] A realization of type A finite $W$-(super)algebra in terms of (super) Yangian qsms 2021.04.09 1235
40 [Seminar 2020.11.25] On the ordering of the Markov numbers (AM 10:00~12:00) qsms 2020.11.18 941
39 [Seminar 2021.06.15, 06.22] Cluster algebras with a view toward the Jacobian conjecture qsms 2021.05.28 710
38 [Seminar 2021.05.28] Ramanujan continued fractions of order sixteen qsms 2021.05.21 637
37 [Seminar 2020.12.03~05]Visual Studio Code를 사용하여 편리한 LaTeX 환경 구축하기 qsms 2020.12.02 625
36 [QSMS Monthly Seminar] A survey on symplectic fillings and Milnor fibers of a normal complex surface singularity qsms 2021.03.26 617
» [QSMS Monthly Seminar] Closed orbits and Beatty sequences qsms 2021.06.24 603
34 [QSMS Monthly Seminar] Symmetric functions and super duality qsms 2021.05.28 600
Board Pagination Prev 1 2 3 Next
/ 3