- Associate Editor, American
Mathematical Monthly.
- Associate Editor, Linear
Algebra and its Applications.
- Editor, Acta Scientiarum
Mathematicarum (Szeged).
- Editor, Indian Journal of
Pure and Applied Mathematics.
- Editor, Texts
and Readings in Mathematics (TRIM) Series.
- Associate Editor, Sao Paulo
Journal of Mathematical Sciences.
- Guest Editor, Journal
of Algebraic Combinatorics, Special issue in
honor of Vyjayanthi Chari's 65th birthday, forthcoming.
- Guest Editor, Indian
Journal of Pure and Applied Mathematics, Tribute volume in
memory of K.R. Parthasarathy: Volume 55 issue 3,
2024.
- Board of Directors, International
Linear Algebra Society, Mar 2021 – Feb 2024.
- Guest Editor, Journal
of the Indian Institute of Science, Special volume on
"Number theory and representation theory": Volume 102 issue 3,
2022.
- Editor, Linear and
Multilinear Algebra, Jan 2020 – Dec 2022.
- Proceedings Editor, Volume
80B, Séminaire Lotharingien de Combinatoire,
2018.
- Organizer, Eigenfunctions
Seminar, IISc Mathematics
- Organizer, APRG
Seminar (with S. Thangavelu; with Muna Naik), IISc Mathematics
- Organizer, Algebra
& Combinatorics Seminar (with R. Venkatesh), IISc
Mathematics
- Organizer, ARCSIN
Seminar (Algebra, Representations, Combinatorics and
Symmetric functions in INdia; with Amritanshu Prasad, Pooja
Singla, R. Venkatesh), 2021–2022.
- First Indo–European
Conference in Mathematics, Symposium on Positivity and
Matrix Analysis, Savitribai Phule Pune University (SPPU) and
Indian Institute of Science Education and Research (IISER), Pune,
Jan 12–16, 2026.
Co-organizer:
Alexander Belton (University of Plymouth, UK).
- BIRS–CMI workshop on Quivers in Representation
Theory (Banff International Research Station; Chennai
Mathematical Institute), CMI Chennai, Nov 30–Dec 5,
2025.
- Co-organizers:
Thomas Brüstle (Université de Sherbrooke and Bishop's
University), Amit Kuber (IIT Kanpur), and Shraddha Srivastava (IIT
Dharwad).
- During a preparatory
Winter School
for this Workshop, I gave several lectures on the
Bernstein–Gelfand–Gelfand (BGG) Category $\mathcal{O}$.
Here are some resources for them:
[Outline of lectures; notes of tutorials]
- The center and its action on highest weight modules
[Video 1]
[Notes] (scribe: Shushma Rani)
- Category $\mathcal{O}$ and its basic properties
[Video 2]
[Notes] (scribe: Shushma Rani)
- Simple objects; Category $\mathcal{O}$ is finite length
[Video 3]
[Notes] (scribe: Shushma Rani)
- Formal characters and the Grothendieck group of $\mathcal{O}$
[Video 4]
[Notes] (scribe: Shushma Rani)
- Decomposing Category $\mathcal{O}$ into central character blocks
[Video 5]
[Video 6]
[Notes] (scribe: Shushma Rani)
- Duality and Ext's; Projective modules in blocks
[Video 7]
[Video 8]
[Notes] (scribe: Shushma Rani)
- Third joint SIAM/CAIMS annual
meetings (AN25), Montréal Convention Center, Jul
28 – Aug 1, 2025
– Member of the Organizing Committee.
Organizing Co-chairs:
Sue Ann Campbell (Waterloo) and Arvind K. Saibaba (NC State).
- Mini-symposium on Total positivity,
International Linear Algebra Society (ILAS) Meeting, National Sun Yat-sen University
(Kaohsiung, Taiwan), Jun 23–27, 2025.
Co-organizer:
Projesh Nath Choudhury (IIT Gandhinagar).
- Algebraic and Combinatorial
Methods in Representation Theory (in honour of
Vyjayanthi Chari's 65th birthday), International Centre for
Theoretical Sciences (ICTS) Bangalore, Nov 13–24, 2023
– Member of the Scientific Committee.
Organizers:
B. Ravinder (IIT Tirupati), R. Venkatesh (IISc Bangalore), and S.
Viswanath (IMSc Chennai).
- Theory and applications of total
positivity (supported by the AIM and NSF), American
Institute of Mathematics (Pasadena), July 24–28,
2023.
Co-organizers:
Dominique Guillot (U. Delaware) and Shaun Fallat (U. Regina).
- Invited Mini-symposium on Distance matrices of
graphs, International Linear Algebra Society (ILAS) Meeting, National University of
Ireland (Galway), Jun 20–24, 2022.
Co-organizer:
Projesh Nath Choudhury (IISc Bangalore).
- Joint Mathematics Symposium with IISER
Pune (virtual), Sep 17–18, 2021.
Co-organizers:
Chandrasheel Bhagwat and Tejas Kalelkar (IISER Pune) and Vamsi
Pritham Pingali (IISc Bangalore).
- Farewell Symposium for Dilip P. Patil,
Indian Institute of Science,
Jul 29–30, 2021.
Co-organizers:
Ravi A. Rao (NMIMS, Mumbai),
Jugal K. Verma (IIT Bombay),
Kriti Goel (IIT Gandhinagar),
Shreedevi Masuti (IIT Dharwad),
and R. Venkatesh (IISc Bangalore).
- 30th International Conference on Formal Power Series
and Algebraic Combinatorics (FPSAC), supported by the
NSF, Dartmouth College, July 16–20, 2018.
Co-organizers:
Too many to fit into this margin; see the conference website.
- Invited Mini-symposium on Linear Algebra and
Positivity with Applications to Data Science,
International Linear Algebra Society (ILAS) Meeting, Iowa State University,
July 24–28, 2017.
Co-organizers:
Dominique Guillot (U. Delaware) and Bala Rajaratnam (UC
Davis).
- AMS Special Session on Positivity and Matrix
Inequalities, AMS–MAA 2015 Joint Mathematics Meetings
(San Antonio), January 13, 2015.
Co-organizers:
Dominique Guillot and Bala Rajaratnam (Stanford).
- AMS Special Session on Limits of Discrete
Structures, AMS–MAA 2015 Joint Mathematics
Meetings (San Antonio), January 12, 2015.
Co-organizers:
Peter Diao, Dominique Guillot, and Bala Rajaratnam (Stanford).
- Positivity, graphical models, and modeling of complex
multivariate dependencies (supported by the AIM and
NSF), American Institute of Mathematics (Palo Alto), October
13–17, 2014.
Co-organizers:
Dominique Guillot and Bala Rajaratnam (Stanford) and Helene Massam
(York).
- Lie Theory Workshop on Quantum Groups
(supported by the NSF and Stanford), Stanford University,
February 1–2, 2014.
Co-organizers:
Daniel Bump and Persi Diaconis (Stanford).
- Young Researchers Meet (Mathematics and Computer
Science) (sponsored by the Department of Science and
Technology, India and the Indo–US Science and Technology
Forum), Stanford University, May 26–27, 2012.
Co-organizer:
Govindan Rangarajan (IISc Bangalore).
- Lie Theory Workshop on Quantum Groups
(supported by the NSF and Stanford), Stanford University,
February 4–5, 2012.
Co-organizers:
Daniel Bump (Stanford) and Anne Schilling (UC Davis).
- (Not organized by me:) This links to
the mirror site for the Young Researchers
Meet (Mathematics and Computer Science) (sponsored by
the Department of Science and Technology, India and the
Indo–US Science and Technology Forum), Brown University,
May 15–16, 2010.
Organizers:
Govindan Rangarajan (IISc Bangalore) and Govind Menon and Kavita
Ramanan (Brown University).
(Again, this was not organized by me, but is a mirror site.)