Department of Mathematics,
University of California San Diego
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Math 211B - Group Actions Seminar
Lauren Wickman
University of Florida
Knaster Continua and Projective Fraïssé Theory
Abstract:
The Knaster continuum, also known as the buckethandle, or the Brouwer–Janiszewski–Knaster continuum can be viewed as an inverse limit of 2-tent maps on the interval. However, there is a whole class (with continuum many non-homeomorphic members) of Knaster continua, each viewed as an inverse limit of p-tent maps, where p is a sequence of primes. In this talk, for each Knaster continuum K, we will give a projective Fraïssé class of finite objects that approximate K (up to homeomorphism) and examine the combinatorial properties of that the class (namely whether the class is Ramsey or if it has a Ramsey extension). We will give an extremely amenable subgroup of the homeomorphism group of the universal Knaster continuum.
Host: Brandon Seward
February 10, 2022
12:00 PM
Zoom ID: 967 4109 3409
Email an organizer for the password
Research Areas
Ergodic Theory and Dynamical Systems****************************