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:20250219T113646Z
DTSTART:20250310T150000Z
DTEND:20250310T160000Z
SUMMARY:Manchester Geometry Seminar - Alexander Veselov
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}i1pt-m7bu8n
 kw-trx9fj
DESCRIPTION:Speaker: Dr Alexander Veselov (Loughborough)\n\nTitle: Differ
 ential algebra of polytopes and\ninversion formulas\n\nAbstract: For any
  formal power series\, the coefficients of its compositional inverse are
  certain polynomials in the coefficients of the original power series. R
 emarkably these polynomials can be interpreted in terms of the combinato
 rics of Stasheff polytopes\, also known as associahedra (Loday\, 2005). 
 \n\nAnalogous link exists for the multiplicative inverse of the power se
 ries and special polytopes known as permutohedra. In the talk I will pro
 vide elementary proofs of these facts using the differential algebra of 
 polytopes\, following our recent joint work with V.M. Buchstaber. I will
  also discuss the link with the theory of integrable PDEs and Deligne-Mu
 mford moduli spaces in relation with the works of Witten\, Kontsevich\, 
 Getzler and McMullen.
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Frank Adams Room 1\, Alan Turing Building\, Manchester
END:VEVENT
END:VCALENDAR