TETRAHEDRAL GEOMETRY/TOPOLOGY SEMINAR

         ANNOUNCEMENT

DATE:              Friday, April 4, 2008                     

LOCATION:    Hempfield High School, Room 213 (directions at http://www.millersville.edu/~tgts/)                

                           followed by dinner at a place to be determined.

4:30 TALK:      David Richeson, Dickenson College

                           “Itineraries of rigid rotations of the circle”

                           Let f:S^1-->S^1 be the rigid rotation of the circle (S^1=R/Z) given by f(x)=x+a (mod 1)
                           and let I be a finite set of closed intervals in S^1. Each x in S^1 has an associated itinerary
                           (a_0, a_1, a_2,...), where a_i=1 if f^i(x) is in I and a_i=0, otherwise. In this talk we discuss
                           whether these itineraries are unique. That is, given only an itinerary, is it possible to
                           determine a, I, and x? If so, how do we recover these values?

     EVERYONE WELCOME

       PLEASE FORWARD THIS ANNOUNCEMENT TO ANYONE INTERESTED

           The Tetrahedral Geometry/Topology Seminar is sponsored jointly by

Elizabethtown College, Franklin & Marshall College, Lebanon Valley College and Millersville University.