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VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:GTDS Seminar: Gueo Grantcharov
X-WR-TIMEZONE:Central Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260618T172152Z
UID:tag:localist.com\,2008:EventInstance_41044951622457
DTSTART:20221114T190000Z
DTEND:20221114T200000Z
DESCRIPTION:Speaker: Gueo Grantcharov\, Florida International University\n\
 nTitle: Complex surfaces and indefinite metrics \n\nAbstract: In a 4-dimen
 sional vector space with scalar product of signature (2\,2) and fixed orie
 ntation\, two independent vectors spanning a maximal isotropic (null) plan
 e determine a canonical action of the split-quaternioins. This provides a 
 relation between null vector fields and structures called para-hypercomple
 x on 4-dimensional pseudo-Riemannian manifolds. \n\n A para-hypercomplex s
 tructure contains in particular a complex structure\, so using the Kodaira
  classification for compact complex surfaces\, one can describe the topolo
 gy of the underlying 4-manifold in the compact case. I'll discuss the gene
 ral properties of the metrics and provide basic examples.
GEO:32.98766;-96.749023
LOCATION:Founders Building (FO)\, FO 2.404
SUMMARY:GTDS Seminar: Gueo Grantcharov
URL;VALUE=URI:https://calendar.utdallas.edu/event/gtds_seminar_gueo_grantch
 arov
CATEGORIES:Lectures & Workshops
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