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SUMMARY:Pascal Schweitzer (Darmstadt)
DTSTART:20210514T130000Z
DTEND:20210514T140000Z
DTSTAMP:20260423T003232Z
UID:WCS/26
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/WCS/26/">Aut
 omorphisms of graphs with a forbidden minor</a>\nby Pascal Schweitzer (Dar
 mstadt) as part of Warwick Combinatorics Seminar\n\n\nAbstract\nAccording 
 to Frucht’s classic theorem\, every finite group is the automorphism gro
 up of a finite graph (up to isomorphism). We say the class of all graphs i
 s universal. Babai proved in 1974 that graph classes with a forbidden mino
 r\, such as planar graphs\, graphs of bounded genus\, and graphs of bounde
 d tree width\, are not universal. He also made three conjectures regarding
  automorphisms of such graphs. I will describe a structure theorem of auto
 morphism groups of such graphs\, affirming these conjectures.\n\nThis is j
 oint work with Martin Grohe and Daniel Wiebking.\n
LOCATION:https://researchseminars.org/talk/WCS/26/
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