
hadani@math.utexas.edu
Office Location
RLM 12.118
Postal Address
The University of Texas at Austin
MATHEMATICS
2515 SPEEDWAY, Stop C1200
AUSTIN, TX 787121202

Ph.D., TelAviv University (2006)
Research Interests
 Representation theory
 Theory of algebraic Dmodules.
 Applications to harmonic analysis, signal processing, three dimensional cryoelectron 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 Dmodules 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 nonlinear 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 cryoEM 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 cryoelectron microscopy I  The intrinsic reconstitution algorithm. Annals of Mathematics (2011).Gurevich S. and Hadani R.  Proof of the KurlbergRudnick rate conjecture. Annals of Mathematics (2011).
Hadani R. and Singer A.  Representation theoretic patterns in three dimensional cryoelectron 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 CryoElectron 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 cryoelectron microscopy III  Presence of Point Symmetries. In preparation.