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DTSTART;TZID=America/Toronto:20171109T153000
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URL:https://uwaterloo.ca/pure-mathematics/events/universal-algebra-seminar-
 19
SUMMARY:Universal Algebra Seminar
CLASS:PUBLIC
DESCRIPTION:RENZHI SONG\, DEPARTMENT OF PURE MATHEMATICS\, UNIVERSITY OF WA
 TERLOO\n\n\"Series parallel posets and polymorphisms\"\n\nIn this two part
  series I will talk about the poset retraction problem\non the class of se
 ries parallel posets. In this talk I will make\nintroductions on series pa
 rallel posets and define what a polymorphism\nis and how their existence a
 ffects the complexity of the poset\nretraction problem. \n\nMC 5413
DTSTAMP:20260607T112045Z
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