Tuesday Seminar on Topology

Seminar information archive ~01/19Next seminarFuture seminars 01/20~

Date, time & place Tuesday 17:00 - 18:30 056Room #056 (Graduate School of Math. Sci. Bldg.)
Organizer(s) KOHNO Toshitake, KAWAZUMI Nariya, KITAYAMA Takahiro, SAKASAI Takuya
Remarks Tea: 16:30 - 17:00 Common Room


16:30-18:30   Room #056 (Graduate School of Math. Sci. Bldg.)
松田 能文 (東京大学大学院数理科学研究科) 16:30-17:30
The rotation number function on groups of circle diffeomorphisms
[ Abstract ]
木村 康人 (東京大学大学院数理科学研究科) 17:30-18:30
A Diagrammatic Construction of Third Homology Classes of Knot Quandles
[ Abstract ]
There exists a family of third (quandle / rack) homology classes,
called the shadow (fundamental / diagram) classes,
of the knot quandle, which are obtained from
the shadow colourings of knot diagrams.
We will show the construction of these homology classes,
and also show their relation to the shadow quandle cocycle
invariants of knots and that to other third homology classes.