Tel Aviv University 
Dear all,
The Horowitz seminar renews its activity for the Spring semester this
Monday. Please see our current schedule on the website below. This
week we are happy to have:
Speaker: Barak Weiss, Ben-Gurion University
Title: The Mordell-Gruber spectrum and homogeneous dynamics.
Date: Monday, March 5
Time: 14:30
Place: Schreiber 309
Given a lattice in euclidean space, its Mordell constant is the
supremum of the volumes (suitably normalized) of central symmetric
boxes with sides parallel to the axes, containing no nonzero lattice
points. This is a well-studied quantity in the geometry of numbers,
and is invariant under the action of diagonal matrices on the space
of lattices. In joint work with Uri Shapira, using dynamics of the
diagonal group we obtain new results about the set of possible values
of the Mordell constant (the so-called Mordell-Gruber spectrum).
Best regards,
Seminar webpage:
Technion Math Net-2 (TECHMATH2)
Editor: Michael Cwikel   <> 
Announcement from: Ron Peled   <>