[Facets-of-complexity] Invitation to Monday Lecture & Colloquium - January 28th 2019

["Ita Brunke" <i.brunke@inf.fu-berlin.de>]

You are cordially invited to our next Monday Lecture & Colloquium on
January 28th at 14:15 h & 16:00 h at TU Berlin.

Location:
Room MA 041 - Ground Floor
Technische Universität Berlin
Straße des 17. Juni 136
10623 Berlin

Time: Monday, January 28th - 14:15 h

Lecture: Peter Gritzmann (Technische Universität München)

Title: On dynamic discrete tomography: Constrained flow and multi
assignment problemsfor plasma particle tracking

Abstract:

The talk deals with the problem of reconstructing the paths of a set of
points over time, where, at each of a finite set of moments in time the
current positions of the points in space are only accessible through a
small number of their line X-rays. Such problems originate from the demand
of particle tracking in plasma physics and can be viewed as constrained
version of min-cost-flow and multi assignment problems. (Joint work with
A. Alpers)

Coffee & Tea Break :

Room MA 316 - Third Floor [British Reading]

Time: Monday, January 28th - 16:00 h s.t.

Colloquium: Fei Xue (Technische Universität Berlin)

Title: On successive minima-type inequalities for the polar of a convex body

Abstract:

The second theorem of Minkowski on successive minima provides optimal
upper and lower bounds on the volume of a symmetric convex body in terms
of its successive minima. Motivated by conjectures of Mahler and Makai
Jr., we study bounds on the volume of a convex body in terms of the
successive minima of its polar body. In this talk, we will show the lower
bound in the planar case, and the upper bound in the general case. This
talk is based on joint work with Martin Henk.