# Past Events

Date/Time: Tuesday, November 7, 2017 - 13:30 to 14:30

Venue: Seminar Room, School of Mathematical Sciences

Speaker: Pabitra Barik, IIT Madras

Title: Hitchin pairs on a singular curve

In this talk, we present the moduli problem of rank 2 torsion free Hitchin pairs of fixed Euler characteristic $\chi$ on a reducible nodal curve. We de- scribe the moduli space of the Hitchin pairs. We define the analogue of the classical Hitchin map and describe the...

Date/Time: Monday, November 6, 2017 - 11:35 to 12:30

Speaker: Satyaki Mazumder, IISER Kolkata

Title: Bayesian analysis of one dimensional chirp signal

Chirp signals are frequently used in different areas of science and engineering. MCMCbased Bayesian inference is done here for purpose of one step and multiple step prediction incase of one dimensional single chirp signal with i.i.d. error structure as well as dependenterror structure with...

Date/Time: Friday, November 3, 2017 - 16:30 to 18:00

Venue: Seminar Room, School of Mathematical Sciences

Speaker: Partha Sarathi Chakraborty, IMSc

Title: Instances of local index formula-II

Local Index formula is at the heart of the so called hard Riemannian aspects of Noncommutative Geometry. We will try to see why thisis so important. However so far we have only one computation of the local index formula. We will discuss two more computations.

Date/Time: Friday, November 3, 2017 - 15:30 to 16:30

Speaker: Dr. Dibyendu Roy, NISER

Title: Non-randomness in the KSA of Grain Family of Stream Ciphers

Abstract: Stream ciphers are designed to provide randomness. In 2008, eSTREAM standardize some stream ciphers, Grain-v1 was among them. In this talk, I will talk about the existence of non-randomness of Grain-v1 and its variants for different rounds.

Date/Time: Monday, October 30, 2017 - 11:30 to 12:30

Venue: Seminar Room, School of Mathematical Sciences

Speaker: Partha Sarathi Chakraborty, IMSc

Title: Instances of local index formula

Local Index formula is at the heart of the so called hard Riemannian aspects of Noncommutative Geometry. We will try to see why thisis so important. However so far we have only one computation of the local index formula. We will discuss two more computations.

Date/Time: Monday, October 16, 2017 - 11:30 to 12:30

Venue: Seminar Room, School of Mathematical Sciences

Speaker: Soumalya Joardar, JNCASR, Bangalore

Title: Weyl algebra, Hyperbolic space and Noncommutative Hyperbolic plane

We propose a Weyl system represented on the Hilbert space $L^{2}(\mathbb{H}^{2}, d\mu)$ where $\mathbb{H}^{2}$ is the Hyperbolic plane and $d\mu$ is the corresponding hyperbolic measure. We give four canonical derivations on the algebra and using them propose a Lindbladian...

Date/Time: Friday, October 13, 2017 - 09:30 to 10:30

Speaker: Antar Bandyopadhyay, Indian Statistical Institute, New Delhi

Title: De-Preferential Attachment Random Graphs

**Abstract:** In this talk we will introduce a new model of a growing sequence of random graphs where a new vertex is less likely to join to an existing vertex with high degree and more likely to join to a vertex with low degree. In contrast to the well studied model of...

Date/Time: Thursday, October 12, 2017 - 15:30 to 17:00

Speaker: Antar Bandyopadhyay, Indian Statistical Institute, New Delhi

Title: Random Graphs (4th Lecture)

**This is a Short Lecture Series in Mathematics (SLSM) consisting of 4 lectures of 90 minutes each. This is the final lecture in this series.**

**Abstract:** The...

Date/Time: Wednesday, October 11, 2017 - 16:30 to 18:00

Speaker: Antar Bandyopadhyay, Indian Statistical Institute, New Delhi

Title: Random Graphs (3rd Lecture)

**This is a Short Lecture Series in Mathematics (SLSM) consisting of 4 lectures of 90 minutes each. This is the third lecture in this series.**

**Abstract:** The...

Date/Time: Tuesday, October 10, 2017 - 11:30 to 13:00

Speaker: Antar Bandyopadhyay, Indian Statistical Institute, New Delhi

Title: Random Graphs (2nd Lecture)

**This is a Short Lecture Series in Mathematics (SLSM) consisting of 4 lectures of 90 minutes each. This is the second lecture in this series.**

**Abstract:** The...

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