
Special Issue on Representation Theory and Integrable Systems in honor of Vitaly Tarasov on the 60th birthday and Alexander Varchenko on the 70th birthday
The Guest Editors for this special issue are
Pavel Etingof (Massachusetts Institute of Technology, USA)
Giovanni Felder (ETH Zürich, Switzerland)
Evgeny Mukhin (Indiana University  Purdue University Indianapolis, USA)
This special issue of SIGMA is created in honor of Vitaly Tarasov on his 60th birthday and Alexander Varchenko on his 70th birthday, to celebrate their outstanding contribution to mathematics and mathematical physics.
The volume consists of 13 papers for a total of 338 pages covering a wide range of topics in geometry, representation theory, and integrable systems.
We are grateful to all the authors who contributed to this volume and to the referees for providing constructive reviews. Many of the papers were reported at the corresponding conference held at ETH in Zurich, August 12–18, 2019. We thank all the speakers and the participants for contributing to the success of the conference.
The Guest Editors
Papers in this Issue:

An Introduction to Motivic Feynman Integrals

Claudia Rella
SIGMA 17 (2021), 032, 56 pages [ abs
pdf ]

Twisted Traces and Positive Forms on Quantized Kleinian Singularities of Type A

Pavel Etingof, Daniil Klyuev, Eric Rains and Douglas Stryker
SIGMA 17 (2021), 029, 31 pages [ abs
pdf ]

Quantum KTheory of Grassmannians and NonAbelian Localization

Alexander Givental and Xiaohan Yan
SIGMA 17 (2021), 018, 24 pages [ abs
pdf ]

Harmonic Analysis in $d$Dimensional Superconformal Field Theory

Ilija Burić
SIGMA 17 (2021), 007, 38 pages [ abs
pdf ]

Quantum Groups for Restricted SOS Models

Giovanni Felder and Muze Ren
SIGMA 17 (2021), 005, 26 pages [ abs
pdf ]

With Wronskian through the Looking Glass

Vassily Gorbounov and Vadim Schechtman
SIGMA 17 (2021), 001, 26 pages [ abs
pdf ]

Representations of Quantum Affine Algebras in their $R$Matrix Realization

Naihuan Jing, Ming Liu and Alexander Molev
SIGMA 16 (2020), 145, 25 pages [ abs
pdf ]

Extension Quiver for Lie Superalgebra $\mathfrak{q}(3)$

Nikolay Grantcharov and Vera Serganova
SIGMA 16 (2020), 141, 32 pages [ abs
pdf ]

Perfect Integrability and Gaudin Models

Kang Lu
SIGMA 16 (2020), 132, 10 pages [ abs
pdf ]

Yangian of the General Linear Lie Superalgebra

Maxim Nazarov
SIGMA 16 (2020), 112, 24 pages [ abs
pdf ]

Duality for KnizhnikZamolodchikov and Dynamical Operators

Vitaly Tarasov and Filipp Uvarov
SIGMA 16 (2020), 035, 10 pages [ abs
pdf ]

ThreeDimensional Mirror SelfSymmetry of the Cotangent Bundle of the Full Flag Variety

Richárd Rimányi, Andrey Smirnov, Alexander Varchenko and Zijun Zhou
SIGMA 15 (2019), 093, 22 pages [ abs
pdf ]

Multiparameter Schur $Q$Functions Are Solutions of the BKP Hierarchy

Natasha Rozhkovskaya
SIGMA 15 (2019), 065, 14 pages [ abs
pdf ]
