BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:adamgibbons/ics
METHOD:PUBLISH
X-PUBLISHED-TTL:PT1H
BEGIN:VEVENT
UID:-_BZ3UNgpxVLmdLDywVo-
SUMMARY:Theorems of the 21st Century Seminar
DTSTAMP:20260806T191300Z
DTSTART;VALUE=DATE:20260818
DESCRIPTION:Date: August 19\, 2026 (Wednesday) at 4PM (UK time)\n\nSpeaker:
	 Prof. Marc Lackenby\, University of Oxford\, UK\n\nTopic: Knots\, Links\,
	 and Polynomial Bounds\n\nAbout the Talk: Prof. Marc Lackenby is a leading
	 mathematician in topology\, geometry\, and group theory\, with major cont
	ributions to knot theory and low-dimensional topology. In this talk\, he w
	ill discuss Reidemeister moves\, the elementary transformations that relat
	e different diagrams of the same knot or link\, and the question of how ef
	ficiently one can pass between such diagrams. The talk will highlight his 
	polynomial bounds for simplifying diagrams of the unknot\, and explain rec
	ent work extending these ideas to every fixed link type. It will also desc
	ribe the consequences for the computational complexity of recognizing knot
	s and links. See the blog announcement https://functor.network/user/3333/e
	ntry/1896 of this talk for more details.\n\nLink to join: At the scheduled
	 time\, joint the talk here: https://teams.microsoft.com/meet/368108940453
	229?p=N3MMVUmzeHslp4wjva No registration required.
URL:https://th21.le.ac.uk/
LOCATION:Online
END:VEVENT
END:VCALENDAR