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DTSTART:20150308T070000
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DTSTART:20141102T060000
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DTSTART;TZID=America/Toronto:20150723T140000
SEQUENCE:0
TRANSP:TRANSPARENT
DTEND;TZID=America/Toronto:20150723T140000
URL:https://uwaterloo.ca/pure-mathematics/events/computability-learning-sem
 inar-7
LOCATION:M3 4206 Canada
SUMMARY:Computability Learning Seminar
CLASS:PUBLIC
DESCRIPTION:MOHAMMAD MAHMOUD\, PURE MATHEMATICS\, UNIVERSITY OF WATERLOO\n\
 n\"A Class of Structures without a Turing Ordinal\"\n\nWe continue to show
  that the class Kw has no Turing Ordinal. We\nconstruct a set D which is n
 ot enumeration reducible to R_\\A for any\nstructure \\A in Kw. This will 
 imply directly that if the Turing\nordinal exists then it must be strictly
  greater than 0. On the other\nhand Joe Miller showed that\, for our class
 \, if the Turing Ordinal\nexists it must be 0. Both statements tell us tha
 t the Turing Ordinal\ncan't exist.
DTSTAMP:20260606T013609Z
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