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SUMMARY:Julia Knight (University of Notre Dame)
DTSTART:20210405T203000Z
DTEND:20210405T213000Z
DTSTAMP:20260423T022742Z
UID:CTA/46
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CTA/46/">Des
 cribing structures and classes of structures</a>\nby Julia Knight (Univers
 ity of Notre Dame) as part of Computability theory and applications\n\n\nA
 bstract\nThe talk will recall some definitions and results on Scott comple
 xity of individual countable structures\, Borel complexity of classes of s
 tructures\, and Borel cardinality\, for comparing classification problems 
 for different classes. I will try to indicate how methods from computabili
 ty may sometimes be used in this connection\, even for results that do not
  mention computability. I will state some results on torsion-free Abelian 
 groups\, due to Downey-Montalbán\, Hjorth\, Thomas\, and Paolini-Shelah. 
 Finally\, I will mention a project with Turbo Ho and Russell Miller\, sayi
 ng what we would like to do\, but have not done.\n
LOCATION:https://researchseminars.org/talk/CTA/46/
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