Hiroshima University Topology-Geometry Seminar

Topology-Geometry Seminar is held on every Tuesday (and temporarily online using the Zoom platform).
The talks are given mainly in Japanese.

August 11 (Tue), 2020 (15:00-17:00 at Zoom)
- Masahiro Kawamata (Hiroshima University) :
  
  Left-invariant Ricci soliton metrics on some almost abelian Lie groups
- Yasuki Tada (Hiroshima University) :
  On poles of quandles and quotients of Alexander quandles by poles
- Yuji Kondo (Hiroshima University) :
  A classification of left-invariant Lorentzian metrics on some nilpotent Lie groups
October 27 (Tue), 2020 (15:00-16:00 at Zoom)
Yuta Nozaki (Hiroshima University) :
Subgroups of the mapping class group and homology cylinders
November 17 (Tue), 2020 (15:00-16:00 at Zoom)
Daiki Iguchi (Hiroshima University) :
Thick isotopy property and the mapping class groups of Heegaard splittings
December 8 (Tue), 2020 (15:00-16:00 at Zoom)
Yusuke Yuno (Tsuda University) :
Homology valued invariants for trivalent fatgraph spines
December 14 (Mon), 2020 (15:00-16:00 at Zoom)
Yu Iijima (Hiroshima University) :
On centralizers of images of outer actions of profinite mapping class groups on profinite free groups
December 22 (Tue), 2020 (15:00-16:00 at Zoom)
Atsufumi Honda and Himemi Sato (Yokohama National University) :
Duality of singularities for spacelike mean curvature one surfaces in de Sitter space
January 19 (Tue), 2021 (15:00-16:00 at Zoom)
Yuka Kotorii (Hiroshima University / RIKEN) :
On classification of links up to link-homotopy