BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Drupal iCal API//EN
X-WR-CALNAME:Events items teaser
X-WR-TIMEZONE:America/Toronto
BEGIN:VTIMEZONE
TZID:America/Toronto
X-LIC-LOCATION:America/Toronto
BEGIN:DAYLIGHT
TZNAME:EDT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
DTSTART:20240310T070000
END:DAYLIGHT
BEGIN:STANDARD
TZNAME:EST
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
DTSTART:20241103T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:69fa4d7dde4cd
DTSTART;TZID=America/Toronto:20250115T153000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20250115T170000
URL:https://uwaterloo.ca/pure-mathematics/events/differential-geometry-work
 ing-seminar-127
SUMMARY:Differential Geometry Working Seminar
CLASS:PUBLIC
DESCRIPTION:SPIRO KARIGIANNIS\, UNIVERSITY OF WATERLOO\n\nInfinitesimal def
 ormations of G-structures\n\nI will introduce the setting of G-structures 
 on an oriented Riemannian\nn-manifold\, where G is a closed Lie subgroup o
 f SO(n). These can be\nunderstood in terms of global sections of the SO(n)
  bundle which is\nthe quotient of the SO(n)-prinicipal bundle of oriented 
 orthonormal\nframes by the free action of G. We will define the intrinsic 
 torsion\nof a G-structure\, and explain how to describe infinitesimal\ndef
 ormations of G-structures. If time permits\, we will discuss a\nDirichlet 
 energy type of functional on the space of G-structures\,\nwhose critical p
 oints are called harmonic G-structures. This condition\nincludes the torsi
 on-free G-structures but is more general. These\nideas were developed rece
 ntly by Fowdar\, Loubeau\, Moreno\, Sa Earp\nbuilding on earlier work in t
 he G2 and Spin(7) cases by myself from\n2006-2007.\n\nMC 5479
DTSTAMP:20260505T200517Z
END:VEVENT
END:VCALENDAR