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SUMMARY:Alexander Hulpke (Colorado State)
DTSTART:20210427T190000Z
DTEND:20210427T200000Z
DTSTAMP:20260423T021705Z
UID:PALS/7
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/PALS/7/">Rew
 riting systems and group extensions</a>\nby Alexander Hulpke (Colorado Sta
 te) as part of PALS Panglobal Algebra and Logic Seminar\n\n\nAbstract\nThe
  first examples of groups in a textbook are often as words in generators\,
  subject to some easy rules. This seems nice and natural\, but gets quickl
 y abandoned once the groups involved become more complicated. A similar di
 sappointment happens when introducing group extensions: Examples in textbo
 oks never go beyond easy cases such as cyclic groups or split extensions.\
 nBut this is not intended to whine about textbooks. Instead I want to show
  how a systematic approach to normal form words (namely confluent rewritin
 g systems) can be used to describe group extension (and explicitly compute
  2-cohomology)\, resulting in practically useful (and implemented!) algori
 thms.\n
LOCATION:https://researchseminars.org/talk/PALS/7/
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