Reshetikhin Nicolai

Professor of Mathematics
Department of Mathematics, Evans Hall 917,
University of California, Berkeley, CA 94720-3840
email: reshetik at-sign
phone number: 510- 642-6550
Royal Danish Academy of Sciences and Letters .


My research interests:
My research interests lie at the interface of mathematical physics, geometry and representation theory, more specifically in quantum field theory, statistical mechanics, geometry and low-dimensional topology, and representation theory of quantum groups.

Representation theory of quantum groups and of quantized universal enveloping algebras is the main algebraic structure behind integrability of most known "non-Gaussian" integrable models in classical and quantum mechanics, in field theory, and in statistical mechanics. This direction has many fascinating problems ranging from answering deep questions in statistical mechanics (in solvable examples, where more tools are available) to deep structural results in representation theory which are motivated by physical applications.

Representation theory of quantum groups is also a powerful tool behind constructions of invariants of knots and 3-dimensional manifolds. Invariants of knots and 3-manifolds can also be obtained by quantizing classical topological field theories. Such theories are, as a rule, are gauge invariant (examples are Chern-Simons theory, BF theory, Poisson sigma model and others). Quantization of such theories involve a lot of modern geometry. One of the challenges in this direction is to develop semiclassical quantization of such theories for space time manifolds with boundary.

Chern-Simons Research Lectures: The lectures series in Berkeley representing modern developments in mathematical physics.

Spring 2015 Representation theory, and mathematical physics. 891 Evans, Fridays, 4:00-5:30pm.

Most of my publications after 1994 can be found on the

Here are two unpublished preprints on invariants of knots and quantum groups which were written in 1987, were circulated by mail, but were never published: Invariants of tangles 1 and Invariants of tangles 2

Here is the preprint (with A. N. Kirillov) where quantum 6j-symbols were introduced and studied: q-6j The results were published in [A. N. Kirillov and N. Yu. Reshetikhin. Representations of the algebra Uq(sl(2)), q-orthogonal polynomials and invariants of links. In Infinite-dimensional Lie algebras and groups (Luminy-Marseille, 1988), pages 285-339. World Sci. Publishing, Teaneck, NJ, 1989] but this volume is difficult to obtain.

Topics in mathematical physics:
This is loosely organized collection of references on various topics in mathematical physics.
The 6-vertex model is statistical mechanics.
Dimer models is statistical mechanics.
Quantization of gauge theories.


2017, Fall Calculus Math 1B , math 261B: Geometry of Poisson Lie groups and quantum groups (joint with V. Serganova) .
2017, Spring Calculus Math 1B , Topological quantum field theory and conformal field theory .

Some previously taught courses:

2016, Fall Calculus Math 1B , Freshmen seminar on probability theory, math 24
2015, Spring Calculus Math 1B , Quantum gauge field theories .
2013, Fall Complex Analysis Math 185 , section 001, Quantum Integrable Systems .
2012, Fall Quantum Field Theory.
2010, Spring Differential Geometry Math 140
2009, Spring Quantum Groups Math 261B
2008, Spring Topological Quantum Field Theory.


Current graduate students:David Keating, Kai-Chieh Chen, Ammar Husain .
Former graduate students: Josef Mattes, Anton Kast , Eugene Stern , Michael Kelber , Peter Tingley, Susan Harrington, Milen Yakimov , Gizem Karaali Ari Nieh, Konstantin Palamarchuk, Ben Webster, Qingtao Chen , Sevak Mkrtchyan , Noah Snyder , Magnus Lauridsen (University of Aarhus), Dan Belthoft (University of Aarhus),Theo Johnson-Freyd , Harold Williams ,Alexandru Chirvasitu, Mohammad Safdari, Shamil Shakirov , Alexander Shapiro Gus Schrader ,Ananth Sridhar
Former master students: Alex Kogan, Wicher Malten (UvA), Robert Noest (UvA), Eddie Nijholt (UvA), Anton Quelle (UvA), Tim Weelinck (UvA), Keiren Scott James-Lubin, Kevin Wray, Pelle Steffens (UvA)


Photos from 198(1-3?) conference "Quantum Solitons" . The photos were taken by A. Budagov, and scanned by M. Semenov-Tian-Shansky .
St. Petersburg , photos by I. Vinogradova.
Paintings by St. Petersburg artist N. Rosenbaum. See also this online exposition.