Chennai Mathematical Institute
Seminars




Today's Seminar
  • 07-01-26
    Lecture Announcement
    Date: Wednesday, 7 January 2026
    Time: 3:30 - 4:00 p.m.
    Venue: Seminar Hall
    Configurations of points in projective space and their projections
    Justyna Szpond
    University of the National Education Commission, Krakow, Poland.
    Abstract
    We call a set of points $Z\subset\mathbb P^{3}_{\mathbb C}$ an $(a,b)$-geproci set (for GEneral PROjection is a Complete Intersection) if its projection from a general point $P$ to a plane is a complete intersection of curves of degrees $a$ and $b$. Examples which we call grids have been known since 2011. During the talk I will show a construction of nongrid nondegenerate $(a,b)$-geproci sets, for any $4 \leq a \leq b$. I will also show that the only such example with $a=3$ is a $(3,4)$-geproci set coming from the $D_4$ root system. This is the joint project with Luca Chiantini, {\L}ucja Farnik, Giuseppe Favacchio, Brian Harbourne, Juan Migliore and Tomasz Szemberg.


Today's Seminar
  • 07-01-26
    Lecture Announcement
    Date: Wednesday, 7 January 2026
    Time: 4:00 pm - 4:30 p.m.
    Venue: Seminar Hall
    A Torelli type theorem for elliptic curves
    Tomasz Szemberg
    University of the National Education Commission, Krakow, Poland.
    Abstract
    I will discuss if and how an elliptic curve can be recovered from a configuration of 9 flex lines. Along the same lines, I will discuss this question for a configuration of sixtuple conics. This is a report on a work in progress with G. Malara, L. Merta, J. Szpond, H. Tutaj Gasinska and M. Zielinski.


Forthcoming Seminars
  • 12-01-26
    Physics Seminar
    Date: Monday, 12 January 2026
    Venue: Lecture Hall 6
    Time: 11.00 am to 1.00 p.m.
    Boundary Energy-Momentum Tensors for Asymptotically Flat Spacetimes
    Vijay Nenmeli
    University of Edinburgh.

  • 12-01-26
    Physics Seminar
    Speaker: Aradhita Chattopadhyaya, CMI
    Date: Monday, 12 January 2026
    Time: 3:45 p.m.
    Venue: TBA
    Mock Modular forms and Vafa Witten Theory
    Aradhita Chattopadhyaya
    Chennai Mathematical Institute.

  • 15-01-26
    Physics Seminar
    Date: Thursday, 15 January 2026
    Time: 3:45 p.m.
    Venue: TBA
    Mock Modular forms and Vafa Witten Theory
    Aradhita Chattopadhyaya
    Chennai Mathematical Institute.

  • 27-01-26
    Lecture series announcement
    Dates: 27, 28, 30 January and 2 & 4 February 2026
    Time: 3.45 to 4.45 PM
    Venue: Lecture hall will be announced later, CMI
    Mock modularity of Calabi-Yau threefolds and BPS black holes
    Sergey Alexandrov
    Laboratoire Charles Coulomb and University of Montpellier, CNRS, France.

  • 28-01-26
    Seminar Announcement
    Date: Wednesday, 28 January 2026
    Time: 3.30 to 4.30 p.m.
    Venue: Seminar Hall
    Some early Ramsey type theorems and some applications
    S. D. Adhikari
    RKMVERI.

Past Seminars (this year)
  • 06-01-26
    Seminar Announcement
    Date: Tuesday, 6 January 2026
    Time: 2.00 to 3.30 p.m.
    Venue: Seminar Hall
    Redundancy is all you need (for CSP sparsification)
    Venkatesan Guruswami
    UC Berkeley and Simons Institute.

  • 05-01-26
    Seminar Announcement
    Date: Monday, 5 January 2026
    Time: 2.00 to 3.30 p.m.
    Venue: Seminar Hall
    Optimal Proximity Gaps for Subspace-Design Codes and (Random) Reed-Solomon Code\ s
    Rohan Goyal
    MIT.

  • 05-01-26
    Mathematics Seminar
    Date: Monday, 5 January 2026
    Time: 3.30 to 4.30 p.m.
    Venue: Seminar Hall
    The inverse system of Gorenstein points
    Maria Evelina Rossi
    University of Genoa.