BEGIN:VCALENDAR
PRODID:-//Columba Systems Ltd//NONSGML CPNG/SpringViewer/ICal Output/3.3-
 M3//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260508T131235Z
DTSTART:20260515T130000Z
DTEND:20260515T140000Z
SUMMARY:Pure maths colloquium - Bethany Marsh
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}m26f-mowxq8
 lr-rgd6yy
DESCRIPTION:Speaker: Bethany Marsh (University of Leeds)\n\nTitle: Additi
 ve friezes\n\nAbstract: Joint work with Asilat Bapat\, Véronique Bazier-
 Matte\, Eleonore Faber\, Kunda Kambaso and Yadir Valdivieso.\n\nShephard
  pointed out in 1976 that the addition table for the natural numbers\, w
 hen drawn in the right way\, has the property that each 2 by 2 submatrix
  has determinant 1\, while the multiplication table has an analogous add
 itive property. A Coxeter-Conway frieze consists of alternating rows of 
 positive integers satisfying the former condition\, so he indicated that
  it is natural to consider additive friezes satisfying the latter condit
 ion.\n\nThis talk will be an introduction to additive friezes. We show t
 hat they give rise to a polytope which can be regarded as a symmetrisati
 on of a realisation of the associahedron\, given by Arkani-Hamed\, Bai\,
  He and Yan and Bazier-Matte\, Chapelier-Laget\, Douville\, Mousavand\, 
 Thomas and Y?ldir?m.\n\nAdditive friezes can be defined on any Auslander
 -Reiten quiver\, and we show that additive friezes on the Auslander-Reit
 en quiver of the bounded derived category of a path algebra of a Dynkin 
 quiver are periodic\, generalising a result of Shephard in the classical
  case.\n\nRoom: Frank Adams 1\n\nThe talk will be followed by a receptio
 n.
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Frank Adams 1\, Alan Turing Building\, Manchester
END:VEVENT
END:VCALENDAR