Tel Aviv University 
 
Dear all,
 
This week at the Horowitz seminar on Probability, Ergodic Theory and
Dynamical Systems at Tel Aviv University we are happy to have:
 
Speaker: Benjamin Weiss, The Hebrew University of Jerusalem
Title: On "a curious conjugacy invariant" of Halmos
 
Date: Monday, November 19
Time: 14:30
Place: Schreiber 309
 
Abstract:
One of the problems that Halmos posed at the end of his classic
lectures on ergodic theory concerns a curious conjugacy invariant
that he suggested might distinguish between ergodic toral
automorphisms. I will describe this invariant and report on some
recent results of A. Quas and T. Soo on the ergodic universality of
toral automorphisms which relate to this invariant. In addition I
will indicate an alternative argument which will suffice for the
application to the Halmos problem.
 
Best regards,
 
   Ron
 
Seminar webpage:
 
 <http://www.math.tau.ac.il/~peledron/Horowitz_seminar/Horowitz_seminar.html>
 
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Technion Math Net-2 (TECHMATH2)
Editor: Michael Cwikel   <techm@math.technion.ac.il> 
Announcement from: Ron Peled   <peledron@post.tau.ac.il>