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Logic Seminar
2018-2019

 


Thursday, October 11

  • Logic Seminar
    Felix Weilacher (Caltech)
    Marked groups with isomorphic Cayley graphs but different Borel combinatorics
    3:00 -- 4:00 pm // Linde, Room 255


Abstract: We construct pairs of marked groups with isomorphic Cayley graphs but different Borel chromatic numbers for the free parts of their shift graphs. This answers a question of Kechris and Marks. We also show that these graphs have different Baire measurable and measure chromatic numbers, answering analogous versions of the question.





  

Contact information: A. Kechris, kechris@caltech.edu
Previous seminars

2013-2014

2014-2015

2015-2016

2016-2017

2017-2018