17.04.2024, 13:00  –  Haus 9, Raum 0.17 und Zoom
Forschungsseminar Diskrete Spektraltheorie

Zero measure Cantor spectrum for Sturmian metric graphs

Gilad Sofer (Technion)

Abstract: A classical result by Belissard et al states that the spectrum of a 1-dimensional Hamiltonian with a Sturmian potential is a singular continuous Cantor set of Lebesgue measure zero. More... 

17.04. bis 17.04.2024, 10:15  –  room 2.22, house 9
Forschungsseminar: Gruppen und Operatoralgebren

Duality principles for frames and Riesz sequences via Morita equivalence

Ulrik Enstad

Frames provide a robust notion of infinite spanning sequences in a Hilbert space. Dually, a Riesz sequence is a strong type of linearly independent sequence. The frame property of certain structured... 

18.04.2024, 16:15  –  Raum 1.10
Forschungsseminar Differentialgeometrie

Spinstrukturen und Dirac-Operator

Christian Bär (UP)

Vorbereitung auf das Blockseminar "Geometrie" nach dem Inverted-Classroom-Prinzip.

2.4-2.5.11, 2.5.17-18, Thm 5.1.1 im Skript

19.04.2024, 11:00 Uhr  –  Campus Golm, Building 9, Room 2.22 and via Zoom
Arbeitsgruppenseminar Analysis

Free generators and Hoffman's isomorphism for the two-parameter shuffle algebra

Leonard Schmitz (MPI Leipzig)

Signature transforms have recently been extended to data indexed by two and more parameters. With free Lyndon generators, ideas from B∞-algebras and a novel two-parameter Hoffman exponential, we... 

19.04.2024, 10:30  –  Zoom
Forschungsseminar Statistik

Optimal Stratification Learning: Clustering-by-dimensionality with reconstruction

Clément Berenfeld (UP)

Given i.i.d. random variables drawn from a mixture of immersed low-dimensional submanifolds of different dimensions, we study the minimax estimation of the family of submanifolds in Hausdorff...