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SUMMARY:Paper-folding models for the CAR algebra - Grigorios Kopsacheilis 
 (Westfalische Wilhelms-Universitat Munster)
DTSTART:20250703T100000Z
DTEND:20250703T102000Z
UID:TALK233767@talks.cam.ac.uk
DESCRIPTION:In this talk we discuss the structure of C*-diagonals (in the 
 sense of Kumjian) that appear in the CAR algebra. We present a constructio
 n of a free minimal action on the Cantor space based on the so-called pape
 r-folding sequence\, that gives rise to a Cantor spectrum diagonal that is
  not conjugate to a standard AF diagonal. This allows us to see that in fa
 ct the CAR algebra admits countably many pairwise non-conjugate Cantor spe
 ctrum diagonals\, distinguished by their diagonal dimension (as introduced
  by Li\, Liao and Winter in 2023). This is joint work with Wilhelm Winter.
LOCATION:External
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