Midwest Computability Seminar

XXVI
Part v


The Midwest Computability Seminar is meeting remotely in the winter and spring of 2021. The recurring Zoom link is:

https://notredame.zoom.us/j/99754332165?pwd=RytjK1RFZU5KWnZxZ3VFK0g4YTMyQT09

Meeting ID: 997 5433 2165

Passcode: midwest


slides    Panopto video    YouTube video


This session will be held jointly with the Computability Theory and Applications Online Seminar.


DATE: Monday, April 5th, 2021

TIME: 3:30 - 4:30 PM Central Time

SPEAKER: Julia Knight - University of Notre Dame

TITLE: Describing structures and classes of structures

ABSTRACT: The talk will recall some definitions and results on Scott complexity of individual countable structures, Borel complexity of classes of structures, and Borel cardinality, for comparing classification problems for different classes. I will try to indicate how methods from computability 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, saying what we would like to do, but have not done.



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