Event
Duncan McCoy (Universit茅 du Qu茅bec 脿 Montr茅al)
Friday, February 20, 2026 15:30to16:30
TITLE/TITRE
The unknotting number
听
R脡SUM脡 /听ABSTRACT
The unknotting number of a knot is one of the simplest classical knot invariants to define: it simply counts the minimum times a knot must pass through itself in order to become unknotted. Despite this simple definition, the unknotting number is often fiendishly difficult to compute. Beginning from the definition, I will discuss some of what is known about this invariant and highlight some of the many things that we still do not understand.
PLACE /听LIEU听
Hybride - CRM, Salle / Room 5340, Pavillon Andr茅 Aisenstadt