New York Applied Algebra Colloquium


Andrew Douglas (adouglas2 at
Delaram Kahrobaei (dkahrobaei at
Simon Smith (sismith at
Benjamin Steinberg (bsteinberg at
Time:          Fridays at 11:00 AM - 12:00 PM
Place:          CUNY Graduate Center, Room 3209
                   365 Fifth Avenue (between 34 and 35th streets), New York, NY.

Spring 2016 Schedule

 26Speaker: Artem Dudko (SUNY Stony Brook)
Title: On spectra of Koopman, groupoid and quasi-regular representations.
Abstract: One of the main sources of examples of unitary group representations is the three types of representations listed in the title. We discuss relations between spectra of these representations. In particular, we show that for an ergodic measure class preserving action of a countable group G on a standard Borel space the associated groupoid and quasi-regular representations are weakly equivalent and weakly contained in the Koopman representation.

 4Speaker: Christophe Hohlweg (UQUAM, Montreal, Canada)

 8Speaker: Conchita Martinez-Perez (University of Zaragoza, Spain)
Title: On the conjugacy search problem in certain family of metabelian groups
Abstract: We consider the conjugacy search problem for a family of metabelian groups of finite Pr\"ufer rank that generalizes the solvable Baumslag-Solitar groups. We describe an algorithm for this problem and
analyze its complexity, sowing that it is exponential and in some cases polynomial.