Homepage of the HATA group at DTU

Welcome

HATA (Harmonic Analysis - Theory and Application) is part of the Section of Mathematics at the institute DTU Compute. The group was founded in 2014 by Ole Christensen & Jakob Lemvig, and its activities cover a wide range from pure functional and harmonic analysis to applications. Frame theory is a cornerstone of the HATA group activities, e.g., finite-dimensional frames, Gabor frames, shearlets, and generalized shift-invariant systems on the real line (or more generally on LCA groups).

Recent and upcoming meetings

Recent News

  • Kamilla Haahr Nielsen successfully defended her PhD thesis Constructing dual windows for Gabor frames on November 8, 2019.
  • Jose Luis Romero (Universität Vienna) will visit HATA November 5-8, 2019, and give a talk Sampling along continuous trajectories in the DTU mathematics seminar.
  • Felix Voigtländer (Katholische Universität Eichstätt-Ingolstadt) will visit HATA October 7-11, 2018, and give a talk on Approximation theoretic properties of deep ReLU neural networks in the DTU mathematics seminar.

Recent preprints

Publications and preprints are found here

HATA milestones

  • September 15, 2023: Marzieh Hasannasab has joined the HATA group at DTU as a tenure track assistant professor. Welcome!
  • Kamilla Haahr Nielsen successfully defended her PhD thesis Constructing dual windows for Gabor frames on November 8, 2019. Prof. Morten Nielsen and Jose Luis Romero acted as external members of the PhD committee.
  • Marzieh Hasannasab successfully defended her PhD thesis Operator Representations of Frames and Structured Function Systems on November 22, 2018.
  • Ole Christensen was a guest professor at National University of Singapore, January 8 - February 8, 2018.
  • M. Zakowicz was awarded the PhD-degree on December 4, 2017, University of San Luis (advisor O. Christensen).
  • Jordy V. Velthoven will defend his master thesis on Frame properties of generalised translation-invariant systems on locally compact Abelian groups on June 22, 2017. He is now a PhD student at the Acoustics Research Institute (ARI) in Austria (now at University of Vienna).
  • Ole Christensen was a guest professor at National University of Singapore, December 22, 2016 - January 23, 2017.
  • Mads S. Jakobsen successfully defended his Ph.D. on Friday, October 28, 2016. He is now a postdoc at NTNU.
  • Hans G. Feichtinger was Otto Mønsted visiting professor at HATA from October 1 to December 31, 2016.
  • Kamilla Haahr Nielsen started as Ph.D.-student at HATA on August 1st, 2016.
  • Publication of the second expanded edition of the book An Introduction to frames and Riesz bases by Ole Christensen, Birkhaeuser, 2016
  • Marzieh Hasannasab Jaldehbakhani started as Ph.D.-student at HATA on December 1st, 2015.
  • DFF-Research Project Grant from the Danish Council for Independent Research: Efficient representation of high-dimensional signals of DKK 2.5 million (2015-2018)
  • Jordy V. Velthoven received the VSBfonds Beurs grant with the purpose of studying at DTU.
  • Mads S. Jakobsen received the prestigious EliteForsk prize 2015.
  • Ole Christensen was awarded Teacher of the Year 2014 at DTU. See this video (in Danish)
  • The HATA group was formed in 2014.

Old News