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SUMMARY:Jan Kurkofka (Hamburg)
DTSTART:20210219T140000Z
DTEND:20210219T150000Z
DTSTAMP:20260423T003231Z
UID:WCS/19
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/WCS/19/">Eve
 ry infinitely edge-connected graph contains the Farey graph or $T_{\\aleph
 _0}*t$ as a minor</a>\nby Jan Kurkofka (Hamburg) as part of Warwick Combin
 atorics Seminar\n\n\nAbstract\nThe Farey graph plays a role in a number of
  mathematical fields ranging from group theory and number theory to geomet
 ry and dynamics. Curiously\, graph theory is not among these. We show that
  the Farey graph plays a central role in graph theory too: it is one of tw
 o infinitely edge-connected graphs that must occur as a minor in every inf
 initely edge-connected graph. Previously it was not known that there was a
 ny set of graphs determining infinite edge-connectivity by forming a minor
 -minimal list in this way\, let alone a finite set.\n
LOCATION:https://researchseminars.org/talk/WCS/19/
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