Tohoku Knot Seminar - in Zao -


Octber 12-14, 2005


Kokusai Zao Kogen Hotel

TEL: 023-694-9341

Program

Wednesday, Octber 12

14:00-14:40 Ichiro Torisu (Naruto University of Education)
2-component transverse links


15:00-15:40 Maki Nagura (Yokohama National University)
A characterization of 2-component Brunnian links via Seifert matrices

16:00-16:40 Yasuyuki Miyazawa (Yamaguchi University)
A note on the virtual crossing number of a virtual link


17:00-17:40 Yasutaka Nakanishi (Kobe University)
Local moves and Gordian complices, II



October 13


9:30-10:10 Iwakiri Masahide (Hiroshima University)
Calculation of dihedral quandle cocycle invarinats of pretzel links

10:30-11:10 Alexander Stoimenow (The University of Tokyo JSPS)
Concordance and Thurston-Bennequin invariants of positive/negative knots and links

11:30-12:10 Sang Youl Lee(Pusan National University)
Casson knot invariants of periodic knots with rational quotients



13:30-14:10 Kokoro Tanaka ((The University of Tokyo)
Inequivalent surface-knots with the same knot quandle

14:30-15:10 Kazuhiro Ichihara (Osaka Sangyo University)
Bounds on the diameters of boundary slope sets

15:30-16:10 Reiko Shinjyo (Waseda University)
Infinite sequence of non-conjugate braids having the same closure


16:30-17:10 Masahiro Kawami (Osaka City University)
The spin-preserving symplectic group modulo two


Octber 14

9:30-10:10 Akio Kawauchi (Osaka City University)
Grading the surface-link groups


10:30-11:10 Hiroshi Goda (Tokyo University of Agriculture and Technology)
A classification of Seifert surfaces for some pretzel links
(joint work with Makiko Ishiwata(Tokyo Woman's Christian University))

11:30-12:10 Kimihiko Motegi (Nihon University)
All integral slopes can be Seifert fibered slopes for hyperbolic knots
(joint work with Hyun-Jong Song)

Tohoku Knot Seminar (- Snowy Seminar 2004 -)

January 6 to 9, 2004
at YAMAGATA UNIVERSITY
Advanced Experimental Research Building S401
(Faculty of Science)



This seminar was supported financially by the Constitution of wide-angle mathematical basis
focused on knots (Director: Akio Kawauchi).
(Organizer: Yoshiaki Uchida(Yamagata University))

There were 50 participants.


January 6

14:00-14:40 Ryo Nikkuni (Waseda University)
Self $\#$-moves on spatial graphs

15:00-15:40 Ichiro Torisu (Akita University)
Knot strong triviality and surgery


16:00-16:40 Atsushi Ishii (Osaka University)
A relation between the Links-Gould invariant and the Alexander-Conway polynomial

17:00-17:30 Masafumi Shimozawa (Osaka City University)
Dehn surgery on torus knot


January 7

9:30-10:10 Kazuhiro Ichihara (Nara Women's University)
Distances between boundary slopes


10:30-11:10 Akio Kawauchi (Osaka City University)
On Mecchia-Zimmermanns' application of imitation theory to the numer of knots with
the same hyperbolic 2-fold branched covering



11:30-12:10 Reiko Shinjyo (Waseda University)
Bounding disks to a spatial graph





14:00-14:40 Haruko Miyazawa (Tsuda College)
A group of links and Vassiliev invariants

15:00-15:40 Mikami Hirasawa (Gakushuin University)
SL(2,Z) representations of 2-bridge knot groups via the modular diagram
(a joint work with K. Murasugi)

16:00-16:40 Nafaa Chbili (Tokyo Institute of Technology)
Quantum Invariants and periodicity


17:00-17:40 Yukihiro Tsutsumi (Keio University)
Branched covers of sutured 3-balls and incompressible surfaces in handlebodies




January 8

9:30-10:10 Makoto Tamura(Osaka Sangyo University)
Combinatorics on three starred automatic groups
(a joint work with Y. Nakagawa and Y. Yamashita)


10:00-10:40 Tatsuya Tsukamoto (Waseda University)
A calculus for pseudo-Anosov 3-braids

11:00-11:40 Yasuyuki Miyazawa (Yamaguchi University)
On a polynomial invariant for a virtual knot



14:00-14:40 Yasutaka Nakanishi (Kobe University)
Delta unknotting operation and Conway polynomial

15:00-15:40 Choonbae JEON (Tokyo Institute of Technology)
Superbridge index of knots

16:00-16:40 Toshifumi Tanaka (Tokyo Institute of Technolog)
A formula for the colored Jones polynomial of doubled knots


17:00-17:40 Makoto Ozawa (komazawa University)
Primitive spatial embeddings of planar graphs
(Joint work with Yukihiro Tsutsumi)




January 9

10:00-10:40 Masaharu Ishikawa (Tokyo Institute of Technolog)
Questions on the links of divides


11:00-11:40 Takuji Nakamura (Osaka City University)
Notes on the ``braidzel''


12:00-12:40 Yoshiaki Uchida (Yamagata University)
Branched covering space of $S^3$ branched over pretzel knot
(Joint work with Enrique Ramirez Losada (CIMAT))