Sushil Singla | Department of Mathematics


Research Associate
Department of Mathematics
School of Natural Sciences (SNS)
Shiv Nadar University
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Educational Qualifications 
B.Sc. Physical Sciences
St, Stephens College
M.Sc. Mathematics
Shiv Nadar University
PhD Mathematics
Shiv Nadar University Delhi NCR
Work Experience 
Research Assistant under DST INSPIRE Project,
Shiv Nadar University Delhi NCR
Research Associate,
Shiv Nadar University Delhi NCR
Research Associate,
Indian Institute of Science
I currently work here
Teaching & Research Interests: 

I completed my Ph.D. in Mathematics from the Department of Mathematics, Shiv Nadar University Delhi NCR on 15th March, 2022. I did my B.Sc. Physical Sciences from St. Stephens’ College, New Delhi and M.Sc. Mathematics from Shiv Nadar University, Delhi NCR campus. My area of research is Functional analysis and Operator algebras, and my thesis topic is ‘Birkhoff-James orthogonality and distance formulas in C*-algebras and for tuples of operators’. I have interest in undergraduate and graduate teaching and would like to explore various branches of mathematics. This webpage was last updated on 1st July after that I joined IISc Bangalore as research associate.

Conferences (Select): 

19. 9th International Conference on Matrix Analysis and Applications (ICMAA 2022), University of Aveiro, Portugal. June 15-18, 2022. Title: A distance formula for tuples of operators.
18. ILAS Special Session on Matrix Analysis and Applications II, Virtual JMM 2022, Meetings and Conference Department, American Mathematical Society, April 6-9, 2022. Title: A distance formula for tuples of doubly commuting matrices.
17, Southeastern Analysis Meeting 38 (2022), Department of Mathematics, University of Florida, on March 5-6, 2022. Title: A distance formula for tuples of doubly commuting matrices.
16. Indian Women and Mathematics (IWM) Annual Conference 2021-22, Banasthali Vidyapith, on January 28-31, 2022. Title: A distance formula for tuples of doubly commuting matrices.
15. The OTTER Math Meeting, organized by Operator Theory Talks for Early Researchers (OTTER), 2TART Seminar Series and Conference, University of Florida, on January 6-7, 2022. Title: A distance formula for tuples of doubly commuting matrices.
14. Matrix Equations and Tensor Techniques IX (METTIX), Department of Mathematics and Computer Science, University of Perugia, Italy, on September 9-10, 2021. Title: A distance formula for tuples of doubly commuting matrices.
13. Operator Algebras and Applications, On the occasion of the 88th birthday of Masamichi Takesaki, August 26, 2021, organized by Department of Mathematical Sciences The University of Tokyo.
12. IWOTA Lancaster UK 2021 (Special session on Early Career Researchers), Lancaster University, on August 16-20, 2021. Title: Orthogonality and Ideals of C*-algebras.
11. 32nd Annual International Workshop on Operator Theory and its Applications (IWOTA) 2021 (Special Session on Infinite Dimensional Analysis and Stochastic Processes), Chapman University Orange, California, on August 9-13, 2021. Title: Orthogonality and Gateaux derivative of C*-norm.
10. Young Mathematicians in C*-Algebras, Westfälische Wilhelms-Universität Münster, on August 2-6, 2021. Poster presentation: Orthogonality, Gateaux derivative and ideals in C* -algebras.
9. 2021 Research WebCon in Mathematics and Statistics, College of Science & Mathematics, MSU-Iligan Institute of Technology in coordination with the Mathematical Society of the Philippines-Regions 10, 12 & ARMM and Southern Philippines Society of Theoretical and Applied Statistics, on July 9, 2021. Presentation title: Birkhoff-James Orthogonality and Distance Problems in C*-algebras.
8. Graduate Summer School in Operator Algebras (online), hosted by the Fields Institute and the University of Ottawa, on June 14-18, 2021. Presentation title: Orthogonality and Gateaux derivative of C*-norm.
7. The 49th Canadian Operator Symposium (online), 31st May-4th June, 2021, organized by University of Guelph.
6. The virtual Great Plains Operator Theory Symposium, Washington University, St. Louis, on May 10-15, 2021. Presentation title: Best approximations and orthogonality in Hilbert C*-modules.
5. Virtual National Conference on  Mathematical Analysis and  Applications, National Institute of Technology, Tiruchirappalli, India, on April 23-24, 2021. Presentation title: Birkhoff-James orthogonality in C*-algebras.
4. Indian Women and Mathematics Virtual Annual Conference 2020-21, IIT Dharwad, on March 27-28, 2021.
3. 86th Virtual Annual Conference of the Indian Mathematical Society, An International meet (IMS 2020), VIT, Vellore, on December 17-20, 2020. Presentation title: Best approximations, distance formulas, and conditional expectations in C*-algebras.
2. A Conference on topics in Mathematical Analysis, Ashoka University, Rai, Haryana, India, on December 18-19, 2019.
1. Conference on Algebra, Analysis and Applications, Ambedkar University Kashmere Gate, Delhi, India, on May 10, 2019.


CSIR Senior Research Fellowship


CSIR Junior Research Fellowship


SERB Travel Grant for 9th International Conference on Matrix Analysis and Applications (ICMAA 2022).

Scholarly Activity

Journal Publications (submitted)

1. Grover P., Singla S. : Subdifferential set of the joint numerical radius of a tuple of matrices, submitted.

2. Bukoski J.; Singla S.: Operator algebras associated with graphs and categories of paths: a Survey. submitted.

Journal Publications (accepted or published)

4. Grover P., Singla S. : A distance formula for tuples of operators, Linear Algebra Appl. 650 (2022), 267–285.

3. Khovanskii A.; Singla S.; Tronsgard A. : Interpolation Polynomials and Linear Algebra, C. R. Math. Rep. Acad. Sci. Canada, Vol. 44 (2) 2022.

2. Singla S. : Gateaux derivative of C* norm. Linear Algebra Appl. 629 (2021), 208-218.

1. Grover P., Singla S. : Distance formulas, best approximations and conditional expectations in C*-algebras. J. Ramanujan Math. Soc. 36, No. 1 (2021), 85--91.

Books & Book Chapters

1. P. Grover, S. Singla, Birkhoff-James orthogonality and applications : A survey, Operator Theory, Functional Analysis and Applications, M. A. Bastos, L. Castro, A. Y. Karlovich (eds.), Oper. Theory Adv. Appl. 282, Birkh¨auser, Cham, 2021, pp. 293–315.