Thursday, July 30, 2026

Bittu Chahal (IIT Indore) - Thursday, July 23, 2026 - 4:00 PM (IST)

 Dear All,


The talk of this week will be delivered by Bittu Chahal, a post-doctoral fellow of the Department of Mathematics at IIT Indore. 

Talk Announcement:
Title: Spacing statistics of the Farey sequence
Speaker: Bittu Chahal, IIT Indore.
When: July 23, 2026, 4:00 PM- 5:00 PM IST 
Where: Zoom:






Abstract:
The Farey sequence $\mathcal{F}_Q$ of order $Q$ is the ascending sequence of fractions $a/b$ in the unit interval $(0,1]$ such that $\gcd(a,b)=1$ and $0<a\leq b\leq Q$. The study of the Farey sequence is of independent interest because of its role in the Diophantine approximation, the circle method, and its connection to the Riemann Hypothesis, as established by the classical work of Franel and Landau. In this talk, we discuss the spacing statistics of the Farey sequence by studying equidistribution and correlation measure. In particular, we establish an estimate for the corresponding Weyl sum and explore whether correlation measure is Poissonian or non-Poissonian.

Thank you.
With kind regards,
--
Gaurav Bhatnagar, Atul Dixit, Bibekananda Maji, Krishnan Rajkumar, and Manjil Saikia
Special Functions and Number Theory Seminar


Monday, July 20, 2026

A. Satyanarayana Reddy (Shiv Nadar University) - Thursday, July 2, 2026 - 4:00 PM (IST)

The talk this week is by A. Satyanarayana Reddy, Associate Professor of the Department of Mathematics at Shiv Nadar University. 

Talk Announcement:
Title: A Gateway to the Circle Method: Ramanujan Sums and the Ternary Goldbach Problem
Speaker: A. Satyanarayana Reddy, Shiv Nadar University.
When: July 2, 2026, 4:00 PM- 5:00 PM IST 
Where: Zoom


Abstract
The Ramanujan sum is a fundamental exponential sum possessing deep arithmetic and orthogonality properties. In this talk, we first establish these classical properties, then use them as a gateway to understand the Hardy-Littlewood Circle Method. We will see how additive problems like the Ternary Goldbach Conjecture are translated into integrals of exponential sums. 

--
Gaurav Bhatnagar, Atul Dixit, Bibekananda Maji, Krishnan Rajkumar, and Manjil Saikia
Special Functions and Number Theory Seminar