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PRODID:-//Columba Systems Ltd//NONSGML CPNG/SpringViewer/ICal Output/3.3-
 M3//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20231108T101118Z
DTSTART:20231113T133000Z
DTEND:20231113T143000Z
SUMMARY:Manchester Geometry Seminar - Oleg Karpenkov
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}g290-loplo7
 d5-ky284d
DESCRIPTION:Speaker: Oleg Karpenkov (Liverpool)\n\nTitle: First steps in 
 lattice trigonometry\n\nAbstract: In this talk we discuss a new insight 
 on lattice geometry and its invariants. In particular we get some experi
 ence with integer trigonometric functions introduced in 2008 in the plan
 ar case and generalised to the multidimensional case in 2023. These trig
 onometric functions are closely related to geometric continued fractions
  of the corresponding lattice angles. Lattice trigonometry provides a co
 mprehensive description of singularities of toric surfaces of arbitrary 
 fixed value of Euler characteristic. 
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Frank Adams Room\, Alan Turing Building\, Manchester
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