Hiroshima University TopologyGeometry Seminar Information
TopologyGeometry Seminar is held on every Tuesday.
The talks are given mainly in Japanese.
TopologyGeometry Seminar 2011 starts on April 19, 2011.
Japanese
version is here.
Speakers and Title of Talks

2/21 :Jun Yagi (Kochi University)
The configuration space of a model for ringed hydrocarbon molecules (with S. Goto, Y. Hemmi and K.Komatsu)

2/7 :
Kenichi Fukuda (Hiroshima University)
On dissolution of order of Alexander quandles with \mathbb{F}_{49}
Tomoya Hinawa (Hiroshima University)
Quandle 4cocycle invariant for twistspun trefoil
Katsuya Matsusaki (Hiroshima University)
Cohomogeneity two actions on the complex hyperbolic plane
Eriko Shinkawa (Hiroshima University)
Invariant flat conformal structures and representations of Lie algebras
Akira Kubo (Hiroshima University)
A sufficient condition for congruency of orbits of Lie groups and some applications
Koushirou Wada (Hiroshima University)
On classification of quandles of cyclic type

1/31 :Atsutaka Kowata (Hiroshima University)
On the commutants of a differential operator of order 2

1/17 :Masatoshi Sato (Graduate School of Science, Osaka University)
A local signature for hyperelliptic broken Lefschetz fibrations

12/16 :Motoo Tange (RIMS Kyoto University)
Lens spaces obtained by Dehn surgeries of S^3 or \Sigma(2,3,5)

12/13 :Kentaro Saji (Gifu university)
Singularities of circular surfaces in the 3sphere

12/6 :Yusuke Kuno (Hiroshima University)
A generalization of Dehn twists

11/29 :Sadahiro Maeda (Saga University)
A homogeneous submanifold with nonzero parallel mean curvature
vector in Euclidean sphere (with S. Udagawa)

11/22 :Mikami Hirasawa (Nagoya Institute of Technology)
Sphere eversion, a new method

11/15 :Masahiko Yoshinaga (Kyoto University)
Minimal Stratifications for Line Arrangements

11/1 :Honda Shouhei (Kyushu University)
Collapsing of Riemannian manifolds and onedimensional regular sets

10/25 :Ayaka Shimizu (Osaka City University Advanced Mathematical Institute)
The warping degree and the warping polynomial of a knot diagram

10/18 :Boumuki Nobutaka (Osaka City University Advanced Mathematical Institute)
On a relation between potentials for pluriharmonic maps and
parapluriharmonic maps

8/2 :Teruhisa Kadokami (East China Normal University)
Hyperbolicity and identification of Berge knots of type VII and
VIII

7/26:
Tomoya Hinawa (Hiroshima University)
A classification of cyclic quandles and 2point homogeneous quandles
Katsuya Matsusaki (Hiroshima University)
Homogeneous surfaces in the complex hyperbolic plane
Satoru Tsuchie (Hiroshima University)
Ricci curvatures of solvable submanifolds in symmetric spaces
Akira Kubo (Hiroshima University)
A sufficient condition for congruency of orbits of Lie groups and some
applications
Eriko Shinkawa (Hiroshima University)
Invariant flat geometric structures on homogeneous spaces
Koushirou Wada (Hiroshima University)
An invariant of groups defined by a Lefschetz fibration over the 2sphere

7/19 :Yusuke Kuno (Hiroshima University)
On a generalization of Dehn twists

7/12 :Yasuyoshi Tsutsumi (Oshima National College of MaritimeTechnology)
Negativity of the Lescop invariants of the BrieskornHamm
manifolds

7/5 :Yuichi YAMADA (The University of ElectroCommunications)
4manifolds constructed by lens space surgeries

6/28 :Hiroko Murai (Nara Women's University)
A Haken type theorem on intersections of essential
laminations and genus 2 Heegaard surfaces

6/21 :Shoichi Fujimori (Okayama University)
A construction for triply periodic minimal surfaces

6/14 :Sosuke Ashihara (Hiroshima University)
On biquandles and chdiagrams

6/7 :Jang, Yeonhee (Hiroshima University)
Bridge presentations of links and meridian generators of link
groups
(joint work with Michel Boileau, University of Toulouse III)

5/31 :Michel Boileau（University of Toulouse）
On commensurability classes of hyperbolic knot complements

5/24 :Takahiro Hashinaga (Hiroshima University)
Threedimensional solsolitons and minimality of the
corresponding submanifolds

5/17 :Takanori Imabeppu(Hiroshima University)
On arrow polynomials of checkerboard colorable virtual links

5/10 :Hiroshi Tamaru(Hiroshima University)
Twopoint homogeneous quandles

4/26 :Kouichi Yasui(Hiroshima University)
Cork twisting exotic Stein 4manifolds

4/19 :Ishibe Tadashi(Hiroshima University)
On the fundamental groups of the complement of logarithmic
free divisor
The seminars held in the past (academic) years
Topology
group
Makoto Sakuma email :
sakuma@math.sci.hiroshimau.ac.jp
Hiroshi Tamaru email :
tamaru@math.sci.hiroshimau.ac.jp
Kazuhiro Shibuya email:
shibuya@hiroshimau.ac.jp
Kouichi Yasui email :
kyasui@hiroshimau.ac.jp