BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:``Symmetries of maps and oriented maps via action graphs'' by 
 Tomaz Pisanski (U. Ljubljana)
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260819T062235Z
UID:tag:localist.com\,2008:EventInstance_1153356
DTSTART:20150304T171500Z
DTEND:20150304T181500Z
DESCRIPTION:GASC talk by Tomaz Pisansky:  \n\nWe define action graphs as se
 mi-directed graphs in which the edge set is partitioned into directed 2-fa
 ctors and undirected 1-factors and use them to describe several combinator
 ial structures\, such as maps and oriented maps. The quotient of the actio
 n graph with respect to its automorphism group is called the symmetry type
  graph and is very useful in connection with map symmetries and orientatio
 n preserving symmetries. Several usual cases of regular-\, chiral-\, edge-
 transitive\, vertex-transitive\, and other types of maps and oriented maps
  are revisited. This is work in progress with J\\'an Karab\\'a\\v{s}.
LOCATION:Lake Hall \, 511
SUMMARY:``Symmetries of maps and oriented maps via action graphs'' by Tomaz
  Pisanski (U. Ljubljana)
URL;VALUE=URI:https://calendar.northeastern.edu/event/symmetries_of_maps_an
 d_oriented_maps_via_action_graphs_by_tomaz_pisanski_u_ljubljana
CATEGORIES:Seminar
END:VEVENT
END:VCALENDAR