仭2017

7, February (Tue)
13:40--14:20
Toshio Sato (Joetsu University of Education)
Knots in the solid torus
14:40--15:20
Takuji Nakamura (Osaka Electro-Communication University)
A note on 3-colored knot diagrams
15:40--16:20
Ryosuke Yamamoto (Gunma University)
Simpleness of closed curves on a surface and the lower central series of the fundamental group of the surface
16:40--17:20
Ippei Ishii
(1,1) knots and their 2-fold branched coverings
17:40--18:20
Yuta Nozaki (The University of Tokyo)
Homology cobordisms over a surface of genus one and lens spaces
18:40--19:40
Problem session

31, July (Fri)
10:30--12:00丆13:30--16:00
Yuya Koda (Hiroshima University)
Arc complexes, sphere complexes and Goeritz groups

2, December (Wed)
16:00--18:00
Fabiola Manjarrez Guti?rrez (Universidad Nacional Autonoma de Mexico (UNAM))
Genus two knots which admit a (1,1)-decomposition

31, July (Fri)
10:30--12:00丆13:30--16:00
Yuya Koda (Hiroshima University)
Arc complexes, sphere complexes and Goeritz groups

仭2014

6, June (Fri)
15:00--
Nao Imoto (Nara Women's University)
On monodromy of rationally homologically fiber surface

仭2013

11 June. 2013 丂Seminar Room, Bld 12丂

  10:30 - 15:30  Mr. Naoki Sakata (Hiroshima University)
                       Canonical decompositions of hyperbolic fibered two-bridge link complements

仭2011

23 Nov. 2011 丂L1216丂

  13:30 - 14:30  Prof. Ryosuke Yamamoto (Gunma University)
                      On the construction of invariants for open book decompositions
  14:50 - 15:50  Prof. Toshio Saito (Joetsu University of Education)
                      Connected sums of knots and 2-string free tangles
  16:10 - 17:10  Prof. Takuji Nakamura (Osaka Electro-Communication University)
                      Non-identical twin groups of virtual knot

24 Jan. 2011 ; L1212(morning), L1217(afternoon)
  10:30 -- 12:00  Prof. Kunio Murasugi (Univ. Toronto)
                            Boundedness of zeros of the Alexander polynomial and its applications
  14:00 -- 15:00  Takahiro Kitayama (Univ.Tokyo)
                            Homology cylinders of higher-order           
  15:30 -- 16:30  Prof. Teruaki Kitano (Soka Univ.)
                            Epimorphisms between 3-manifold groups and some inequalities of topological invariants

仭2010

17 Nov. 2010
  Dr. Ayumu Inoue (Tokyo Institute of Technology)
  Quandle homology and complex volume

2 Sep. 2010
  Tetsuya Ito (Univ. Tokyo)
  Bi-ordering of fibered knot groups and twisted Alexander polynomials

30 Jun. 2010
  Dr. Marion Moore (Univ. of California at Davis)
  Alpha-sloped Heegaard splitting

14 Jan. 2010
  Prof. Taehee Kim (Konkuk Univ.)
  The homology cobordism on homology cylinders

仭2009

7 Dec. 2009
  Takahiro Kitayama (Univ. Tokyo)
  On metabelian Reidemeister torsion

4 Dec. 2009
  Takefumi Nosaka (RIMS Kyoto Univ.)
  Algebraic calculations of (co) homology of the Alexander quandle over finite fields

26 Nov. 2009
  Eri Hatakenaka (Tokyo Univ. Agriculture & Technology)
  Covering presentations of 3-manifolds and the Turaev-Viro invariant

22 Oct. 2009
  Prof. Takuya Sakasai (Tokyo Institute of Technology)
  The cobordism group of homology cylinders (by Cha, Friedl and Kim)

9 Oct. 2009
  Dr. Kai Ishihara (Saitama Univ.)
  Algorithm for finding parameter of tunnels

30 Jul. 2009
  Takahiro Kitayama (Univ. Tokyo)
  Non-commutative Reidemeister torsion and Morse-Novikov theory

仭2008

22 Dec. 2008
  Prof. Kokoro Tanaka (Tokyo Gakugei Univ.)
  Khovanov homology II

15 Dec. 2008
  Prof. Kokoro Tanaka (Tokyo Gakugei Univ.)
  Khovanov homology I

1 Dec. 2008
  Takahiro Kitayama (Univ. Tokyo)
  Reidemeister torsion for linear representations and Seifert surgery on knots

17 Sep. 2008
  Prof. Hiroshi Goda (Tokyo Univ. Agriculture & Technology)
  Computations of Knot Floer homology and Novikov homology

9 Sep. 2008
  Dr. Motoo Tange (Kyoto Univ.)
  Sutured Floer homology and its applications

20 Aug. 2008
  13:00 - 14:30  Prof. Takuji Nakamura (Osaka Electro-Communication Univ.)
                          Delta-unknotting numbers for positive knots and almost positive knots
  14:45 - 16:15  Dr. Ryosuke Yamamoto (Osaka City Univ.)
                        Complexity of open book decompositions via arc complex
16:30 - 18:00  Dr. Toshio Saito (Nara Women's Univ.)
                        Knots yielding homeomorphic lens spaces by Dehn surgery
18:15 - 19:45  Problem Session

17 Mar. 2008
  15:00 - 15:50  Prof. Katsuya Mashimo (Tokyo Univ. Agriculture & Technology)
                          From vector analysis to Grassmannian geometry
  16:10 - 17:00  Prof. Kunio Yamagata (Tokyo Univ. Agriculture & Technology)
                        From linear algebra to representation of algebra

仭2008

26 Nov. 2007
  Takahiro Kitayama (Univ. Tokyo)
  Symmetry of twisted Alexander invariants on SU(2)-representation spaces

27 Oct. 2007
  Prof. Kunio Murasugi (Univ. Toronto)
  The twisted Alexander polynomial of 2-bridge knots

15 Oct. 2007
  Dr. Yoshikazu Yamaguchi (Univ. Tokyo)
  On the geometry of a slice of the character variety of a knot group      

1 Oct. 2007
  Dr. Takuya Sakasai (Univ. Tokyo)
  Genus invariants of 3-manifolds related to homology cobordisms of surfaces    

23 Mar. 2007
  Prof. Tomoyuki Wada (Tokyo Univ. Agriculture & Technology)
  The origin of representation theory of groups

20 Mar. 2007
  Dr. Fumikazu Nagasato (Tokyo Institute of Technology)
  On a reduced Kauffman bracket skein module and its properties              

22 Jan. 2007
  Takahiro Kitayama (Univ. Tokyo)
  Refinement of twisted Alexander invariants and sign-deteremined Reidemeister torsions

仭2006

20 Oct. 2006
  Yoshikazu Yamaguchi (Univ. Tokyo)
  On the twisted Reidemeister torsion of the complements of twist knots

25 Aug. 2006
  13:00 - 14:00  Dr. Toshio Saito (Nara Women's Univ.)
                          Destabilizing Heegaard splittings of knot exteriors
  14:10 - 15:10  Kai Ishihara (Saitama Univ.)
                        Heegaard splittings of link exteriors
15:40 - 16:40  Prof. Takuji Nakamura (Osaka Electro-Communication Univ.)
16:50 - 17:50  Dr. Ryosuke Yamamoto (Osaka City Univ.)
                        Overtwisted open books and Stallings twist

26 May. 2006
  Dr. Takuya Sakasai (Univ. Tokyo)
  Alexander invariants for homology cobordisms of surfaces

仭2005

31 Oct. 2005
  Yoshikazu Yamaguchi (Univ. Tokyo)
  SU(2) Reidemeister torsion for knot complements and twisted Alexander polynomial

25 Jul. 2005
  Yoshikazu Yamaguchi (Univ. Tokyo)
  On a surgery formula along knots of non-abelian Reidemeister torsions

22 Jul. 2005
  13:15 - 14:15  Prof. Izuru Mori (SUNY College, Brockport)
                          Point Modules and Co-point Modules
14:30 - 15:30  Prof. Gordana Todorov (Northeastern Univ. Boston)
丂丂丂丂丂丂     Cluster categories and some related topics
16:00 - 17:00  Prof. Kiyoshi Igusa (Brandeis Univ., Waltham)
                        Axiomatic higher torsion and relation to root systems

27 Jun. 2005
  Yuya Koda (Keio Univ.)
  Heegaard splittings and Reidemeister-Turaev torsion of Euler structure

仭2004

23 Jan. 2004
  Dr. Teruhisa Kadokami (Osaka City Univ.)
  Reidemeister torsion of homology lens spaces

16 Jan. 2004
  Dr. Yasuharu Nakae (Univ. Tokyo)
  Taut foliations in torus knot complemets

仭2003

4 Apr. 2003
  Dr. Takashi Takamuki (Kyushu Univ.)
  Homological representations of the Birman-Murakami-Wenzl algebra

27 Mar. 2003
  Dr. Hiroshi Matsuda (Univ. Tokyo)
  Knot Floer homology and Heegaard splittings for (1,1)-knots

7 Feb. 2003
  Dr. Masaaki Suzuki (Univ. Tokyo)
  On the Magnus representation of the mapping class group

仭2002

20 Dec. 2002
  Dr. Toshifumi Tanaka (Kyushu Univ.)
  An introduction of Kirk-Livingston's papers:
Twisted Alexander invariants, Reidemeister torsion, and Casson-Gordon invariants, Topology 38 (1999), 635-661.
Twisted knot polynomials; inversion, mutation and concordance, Topology 38 (1999), 663-671.