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UID:20260604T045657EDT-3325FBu9vg@132.216.98.100
DTSTAMP:20260604T085657Z
DESCRIPTION:On convex normal subgroups.\n\nA subgroup H of a left ordered g
 roup (G\, $le$) is $le$-convex if for any x\,z $in$ H and y $in$ G the ine
 qualities x $le$ y $le$ z imply y∈H. I will show that the family of $le$-c
 onvex normal subgroup can be finite of arbitrary size bigger than 1\, coun
 tably infinite\, or of cardinality continuum. I will also point out there 
 is no countable universal left-orderable group.\n
DTSTART:20180214T200000Z
DTEND:20180214T210000Z
LOCATION:Room 920\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Junyu Lu\, McGill University
URL:https://www.mcgill.ca/mathstat/channels/event/junyu-lu-mcgill-universit
 y-285065
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