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HADANI, RONNY

Ronny Hadani

Associate Professor
Department of Mathematics


Representation Theory

hadani@math.utexas.edu


Office Location
RLM 12.118

Postal Address
The University of Texas at Austin
MATHEMATICS
2515 SPEEDWAY, Stop C1200
AUSTIN, TX 78712-1202

Ph.D., Tel-Aviv University (2006)

Research Interests

  1. Representation theory
  2. Theory of algebraic D-modules.
  3. Applications to harmonic analysis, signal processing, three dimensional cryo-electron microscopy and mathematical physics.

Large portion of my work in the last few years is concerned with the study of the algebraic structures which underlay harmonic analysis over Önite Öelds and over the reals and complex numbers. In this regard, my Öeld of research is a part of "algebraic analysis" and may be referred to as "algebraic harmonic analysis". These algebraic structures appear in two forms which strongly interact with one another.

The Örst is representation theory, speciÖcally, the Weil representation of the symplectic group. The second is algebraic geometry, speciÖcally, the theory of `-adic sheaves in the Önite Öeld setting and the theory of algebraic D-modules in the real and complex setting. My research involves a purely mathematical aspect which is the systematic development of this algebraic framework and an applied mathematical aspect which is application of the mathematical theory to basic problems that originate from other parts of science such as physics and engineering.

Recently, I am devoting much of my research to the development of a novel non-linear optimization paradigm that is based on representation theoretic ideas; this work is conducted as part of a joint e§ort to tackle a fundamental problem in structural biology - determination of three dimensional macromolecular structures from noisy projection images obtained by an electron microscope (three dimensional cryo-EM for short).

PDF versions of most of my publications can be found on my website: http://www.ma.utexas.edu/users/hadani/

Papers in Journals

Hadani R. and Singer A. - Representation theoretic patterns in three dimensional cryo-electron microscopy I - The intrinsic reconstitution algorithm. Annals of Mathematics (2011).

Gurevich S. and Hadani R. - Proof of the Kurlberg-Rudnick rate conjecture. Annals of Mathematics (2011).

Hadani R. and Singer A. - Representation theoretic patterns in three dimensional cryo-electron microscopy II - the class averaging problem. Foundations of Computational Mathematics (FoCM) (2011).

Singer A., Zhao Z., Shkolnisky Y. and Hadani R. - Viewing Angle Classification Of Cryo-Electron Microscopy Images Using Eigenvectors. Siam Journal On Imaging Science (2011).

Gurevich S. and Hadani R., The Categorical Weil Representation. Submitted (2011).

Gurevich S., Hadani R. and Singer A. - Representation theoretic patterns in three dimensional cryo-electron microscopy III - Presence of Point Symmetries. In preparation.