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Wednesday, May 27, 2015
1:00 PM - 2:30 PM
Kellogg 307

Logic Seminar

Menger compacta as projective Fraisse limits with emphasis on dimension one
Slawomir Solecki, Professor, Mathematics, University of Illinois at Urbana-Champaign,

In each dimension d, there exists a canonical compact, second countable space, called the d-dimensional Menger space, with certain universality and homogeneity properties. For d = 0, it is the Cantor set, for d = infinity, it is the Hilbert cube. I will concentrate on the 1-dimensional Menger space. I will prove that it a quotient of a projective Fraisse limit. I will show how a model theoretic property of projective Fraisse limits, called the projective extension property, can be used to prove high homogeneity of the 1-dimensional Menger space.  

This is a joint work with Aristotelis Panagiotopoulos.

 

For more information, please contact Alexander Kechris by email at [email protected] or visit http://www.math.caltech.edu/~logic/index.html.