BEGIN:VCALENDAR
VERSION:2.0
PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Robert Harris (UQAM)
DTSTART:20260220T160000Z
DTEND:20260220T171500Z
DTSTAMP:20260423T021438Z
UID:CIRGET/156
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CIRGET/156/"
 >Recipes for exotic definite 4-manifolds</a>\nby Robert Harris (UQAM) as p
 art of CRM - Séminaire du CIRGET / Géométrie et Topologie\n\nLecture he
 ld in PK-5115.\n\nAbstract\nIt is an ongoing search to find an exotic mani
 fold which is homeomorphic to a sum of complex projective planes (or a su
 m with only oppositely oriented projective planes). Relaxing this conditio
 n\, a smooth definite manifold is one with an intersection form at least i
 somorphic to that of such a space. The door into the study of definite exo
 tica was first opened by the discovery of examples with a fundamental gr
 oup of order two by Levine\, Lidman and Piccirillo and further advancement
 s have since been made to construct examples with larger fundamental group
 s. We will discuss the general recipe for constructing these manifolds\, a
 s well as the specific ingredients that different researchers have been us
 ing. This is based on joint work with Patrick Naylor and B. Doug Park.\n
LOCATION:https://researchseminars.org/talk/CIRGET/156/
END:VEVENT
END:VCALENDAR