SMS scnews item created by Connie Hui at Sat 3 Oct 2026 1409
Type: Seminar
Distribution: World
Expiry: 2 Jan 2027
Calendar1: 7 Oct 2026 1200-1300
CalLoc1: SMRI Seminar Room (Macleay A12 Room 301)
Auth: connieh@112-213-145-6.dyn.ip.vocus.au (ohui0330) in SMS-SAML

Australian Geometric Topology Webinar (AGTW)

AGTW Broadcast 

Date: Wednesday, 7 October 2026

Time: 12noon-1pm

Speaker: Nakisa Ghanbarian (University of Nevada, Reno)

Location: SMRI Seminar Room (Macleay A12 Room 301)

Title: The non-orientable 4-genus for knots with 10 crossings

Abstract: Given a knot in the 3-sphere, the non-orientable 4-genus or 4-dimensional 
crosscap number of a knot is the minimal first Betti number of non-orientable surfaces, 
smoothly and properly embedded in the 4-ball, with boundary the knot. In this paper, we 
calculate the non-orientable 4-genus of knots with crossing number 10.