Name  Hideo Takioka 

Affiliation  Osaka City University 
Talk type  Session 
Time  Jan 10 16:20~16:40 
Location  E11103 
Title  The zeroth coefficient polynomial of a $(2,1)$cable knot 
Abstract 
The zeroth coefficient polynomial is the constant term of the HOMFLYPT polynomial with respect to one of the two variables. We show several calculation results for the zeroth coefficient polynomials of $(2,1)$cable knots. In particular, we give examples of infinitely many knots with the same HOMFLYPT polynomials, which can be distinguished by the zeroth coefficient polynomials of their $(2,1)$cable knots.

Slide  103110/Takioka.pdf 