# Topology Seminar: Professor Masao Hara (Tokai University, Japan)

## Details

**Abstract:**It seemed quite difficult to determined crossing number of a link until Jones discovered a new polynomial invariant. Important results about crossing number of a link were shown after Kauffman gave a method for calculating Jones polynomial.

I will survey the relation between the reduced degree of Jones polynomial of a link and its crossing number and discuss Jones polynomial of a pretzel link. I will introduce an adequate diagram and discuss minimality of a diagram from the viewpoint of it. I will discuss the difference between the reduced degrees of Jones polynomials of pretzel links and their crossing numbers, and whether Jones polynomial is a complete invariant on alternating pretzel knots.

## Additional Information

For more information please visit the event page at: http://www.math.ubc.ca/Dept/Events/index.shtml?period=future&series=all

Professor Masao Hara (Tokai University, Japan)

Professor Masao Hara (Tokai University, Japan)

This is a Past Event

Event Type

**Scientific, Seminar**

Date

**September 28, 2011**

Time

**-**

Location

University of British Columbia