Algebra & Combinatorics Seminar

Title: Combinatorial positive valuations
Speaker: Katharina Jochemko (KTH, Stockholm, Sweden)
Date: 12 December 2018
Time: 3 pm
Venue: LH-1, Mathematics Department

Valuations are a classical topic in convex geometry. The volume plays an important role in many structural results, such as Hadwiger’s famous characterization of continuous, rigid-motion invariant valuations on convex bodies. Valuations whose domain is restricted to lattice polytopes are less well-studied. The Betke-Kneser Theorem establishes a fascinating discrete analog of Hadwiger’s Theorem for lattice-invariant valuations on lattice polytopes in which the number of lattice points — the discrete volume — plays a fundamental role. In this talk, we explore striking parallels, analogies and also differences between the world of valuations on convex bodies and those on lattice polytopes with a focus on positivity questions and links to Ehrhart theory.

Contact: +91 (80) 2293 2711, +91 (80) 2293 2265 ;     E-mail: chairman.math[at]iisc[dot]ac[dot]in
Last updated: 17 Jan 2019