Handle friendship seminar 2022 since 2013
Place:online or University of Tokyo (Komaba campus)
japanese version
If you want to attend this zoom seminar, please register here.
If you register there, I send the Zoom URL to your email address.
2022 Autumn
- The eighth break 3/6 (Mon) (Zoom)
Takefumi Nosaka(Tokyo Insititute of Techlonlogy) 10:00-12:30 (GMT +09:00)
[Title]
TBA
[Abstract] TBA
- The seventh break 11/14 (Mon) (Zoom)
Hayato Imori(Kyoto Univertiy) 10:00-12:30 (GMT +09:00)
[Title]
Intantons, special cycles, and knot concordance III
[Abstract]
- The sixth break10/18 (Tue) (Zoom)
Masaki Taniguchi(Riken) 10:00-12:30 (GMT +09:00)
[Title]
Intantons, special cycles, and knot concordance II
[Abstract]
- The fifth break 10/11 (Tue) (Zoom)
Kouki Sato(Meijo University) 10:00-12:30 (GMT +09:00)
[Title]
Intantons, special cycles, and knot concordance I
[Abstract]
2022 Spring
- The fourth break 7/19 (Tue.) (Hybrid meeting)
Tsukasa Iososhima 10:00-12:30 (GMT +09:00)
[Title]
Trisections obtained by trivially regluing surface-knots
[Abstract]
- The third break 5/31 (Tue.) (Zoom meeting)
Tatsumasa Suzuki 10:00-12:30 (GMT +09:00)
[Title]
Pochette surgery of S4
[Abstract]
Iwase and Matsumoto defined pochette surgery as an operation along an embedded 4-manifold which is homotopy equivalent to the wedge sum of S2 and S1.
In this talk, we compute the ordinary homology of pochette surgery of a homology 4-sphere using a lnking number of pochette embedding.
We show any pochette surgery with the trivial cord gives a diffeomorphic manifold or a Gluck surgery.
And we also show that there exist non-trivial 2-knots that pochette embeddings and with non-trivial cords with the core spheres the 2-knots give S4.
This is a joint work with Motoo Tange.
[Reference]
T. Suzuki and M. Tange, Pochette surgery of the 4-sphere. arXiv:2205.06034
- The second break 5/24 (Tue.) (Zoom meeting)
Youlin Li 10:00-11:00 (GMT +09:00)
[Title]
On geography of symplectic fillings of contact branched covers
[Abstract]
In this talk, we determine the Euler characteristics and signatures of the exact symplectic fillings of the contact double, 3-fold or 4-fold cyclic branched covers of the standard contact 3-sphere along certain transverse quasi-positive links. These links include all quasi-positive knots with crossing numbers smaller than 11 and all quasi-positive links with crossing numbers smaller than 12 and nonzero nullity. This is joint work with Yuhe Zhang.
- The first break 4/5 (Tue.) (Zoom meeting)
Kabaya Yuichi 10:00-12:30 (GMT +09:00)
[Title]
Culler-Shalen Theory
[Abstract]
Japanese version
< Keywords>
4-manifolds, Handle, Handle calculus, Kirby calculus, Exotic structure, Cork, Plug, Heegaard Floer homology, Seiberg-Witten invariant, Yang-Mills theory, Plane field, Contact structure,
Mapping class group, Lefschetz fibration, Fibered knot, Dehn surgery, Ribbon knots, Stein filling, Immersion, Branched cover, Mazur manifold, PALF, Curve graph, Whitehead double, Dehornoy ordering, Braid, Casson-Gordon invariant, Barking deformation, Dehn twist decomposition, Bordered Floer homology, Rasmussen invariant, non-proper stable map, equivariant cork, ribbon disk, Fox-Milnor theorem, trisection, 1-dimensional manifold
This seminar is a sober coffee break for 4-manifold researchers rather than serious seminar.
If you have something interesting for studying handles, would you like to talk in this coffee break.
If you want to attend an online seminar, please contact me.
Email: tange_at_mark_math.tsukuba.ac.jp
< Date last modified >
Seminar