Chennai Mathematical Institute

Seminars




Today's Seminar
  • 19-03-24
    Seminar Announcement
    Date: Tuesday, 19 March 2024
    Time: 3:30 to 4:30 PM
    Venue: Seminar Hall
    Ricci flow and positive curvature
    Anusha Krishnan
    University of Muenster.
    Abstract
    The Ricci flow is a geometric PDE for evolving with time a Riemannian metric on a given manifold. The Ricci flow is heuristically like a heat equation for the metric, and its regularizing properties have been used with great success in solving problems in geometry and topology.

    In this talk I will discuss joint work with R. Bettiol showing that positive curvature is not preserved under the Ricci flow on closed manifolds in dimension 4. This is in contrast to dimension 3, where the preservation of positive curvature under the flow is a crucial step in Hamilton???s theorem that a simply-connected closed 3-manifold with positive Ricci curvature is diffeomorphic to the 3-sphere. Our examples come from metrics on $S^4$ and $\mathbb{C}P^2$ that have a large group of isometries.

    I will discuss background on positive curvature and the Ricci flow, and explain how symmetry enters the proof.


Forthcoming Seminars
  • 20-03-24
    Seminar Announcement
    Date: Wednesday, 20 March 2024
    Time: 3:30 PM
    Venue: Seminar Hall
    A Survey of Percolation Theory(Abstract)
    Aniruddhan Ganesaraman
    ISI Kolkata.

  • 20-03-24
    Physics Seminar
    Date: Wednesday, 20th March 2024
    Time: 2:00 PM
    Venue: Lecture Hall 2
    Testing general theory of relativity with gravitational waves from binary black holes in eccentric orbits(Abstract)
    Pankaj Saini
    Chennai Mathematical Institute.

  • 21-03-24
    CMI Arts Initiative Talk
    Date: Thursday, 21 March 2024.
    Time: 3:30 PM
    Venue: Seminar Hall
    The life and times of BP Koirala(Abstract)
    Dinesh Kafle
    Kathmandu University.

  • 25-03-2024
    Lecture Series Announcement
    Date: 25, 27 and 28 March 2024
    Time: 2:00 to 3:15 PM
    Venue: Lecture Hall 202
    An introduction to mapping class groups(Abstract)
    Kashyap Rajeevsarathy
    IISER Bhopal.

  • 25-03-24
    Data Science Seminar
    Date: Monday, 25 March 2024
    Time: 3:30 PM
    Venue: NKN Hall
    Range of correlation between two random quantities(Abstract)
    N. Rao Chaganty
    Old Dominion University.

  • 03-04-24
    Computer Science Seminar
    Date: Wednesday, 3 April 2024
    Time: 3:30 to 4:30 PM
    Venue: Lecture Hall 2
    On the Monadic Second-Order Theory of Arithmetic Predicates(Abstract)
    Mihir Vahanwala
    MPI-SWS, Saarbrücken, Germany.

Past Seminars (this year)
  • 18-03-24
    Physics Seminar
    Date: Monday, 18 March 2024
    Time: 1.45 PM
    Venue: Lecture Hall 3
    Influence Phase of a de Sitter Observer(Abstract)
    Omkar Sanjay Shetye
    ICTS.

  • 15-03-24
    Mathematics Seminar
    Date: Friday, 15 March 2024
    Time: 11.50 AM to 12:50 PMs
    Venue: Seminar Hall
    Types and Hecke algebras(Abstract)
    Manish Mishra
    IISER Pune.

  • 15-03-24
    Data Science Seminar
    Date: Friday, 15 March 2024
    Time: 2:00 PM
    Venue: NKN Hall
    Derivative pricing from a quants perspective(Abstract)
    Govind Narayanan
    HSBC, Bengaluru.

  • 15-03-24
    Mathematics Seminar
    Date: Friday, 15 March 2024
    Time: 10:30 AM
    Venue: Seminar Hall
    Khovanov homology of positive links(Abstract)
    Naageswaran Manikandan
    Humboldt-Universität zu Berlin.

  • 11-03-24
    Physics Seminar
    Date: Monday, 11th March 2024
    Time: 01:45 PM
    Venue: Lectute Hall 02
    $AdS_2/CFT_1$ holography at finite charge density(Abstract)
    Hemant Rathi
    IIT Roorkee.

  • 06-03-24
    Computer Science Seminar
    Date: Wednesday, 6 March 2024
    Time: 3:30 PM
    Venue: Lecture Hall 5
    Using a Geometric Lens to find k Disjoint Shortest Paths(Abstract)
    Matthias Bentert
    University of Bergen.

  • 06-03-24
    Mathematics Seminar
    Date: Wednesday, 06 March 2024
    Time: 03:30 - 04:20 PM
    Venue: Seminar hall
    Development of moduli of principal bundles and representation theory(Abstract)
    V. Balaji
    Chennai Mathematical Institute.

  • 06-03-24
    Mathematics Seminar
    Date: Wednesday, 06 March 2024
    Time: 02:30 - 03:20 PM
    Venue: Seminar hall
    Geometric realization of perverse filtration(Abstract)
    Ankit Rai
    Chennai Mathematical Institute.

  • 05-03-24
    Computer Science Seminar
    Date: Tuesday, 5 March 2024
    Time: 3:30 PM to 4:30 PM
    Venue: Seminar Hall
    Bidding Games on Graphs - In theory and in practice(Abstract)
    Suman Sadhukhan
    Haifa University, Israel.

  • 27-02-24
    Mathematics Seminar
    Date: Tuesday, 27 February 2024
    Time: 10.30 AM
    Venue: Lecture Hall 4
    Coefficientwise Hankel-total positivity of the Schett polynomials(Abstract)
    Bishal Deb
    Université Paris Cité, CNRS, Paris.

  • 23-02-24
    CMI Arts Initiative
    Date: Friday, 23 February 2024
    Time: 6.30 PM
    Venue: Virtual Mode
    The Sacred Feminine: Women Who Wear Only Themselves(Abstract)
    Arundhathi Subramaniam
    Chennai Mathematical Institute Arts Initiative.

  • 21-02-24
    Seminar Announcement
    Date: Wednesday, 21 February 2024
    Time: 3:30 PM.
    Venue: Seminar Hall
    What Galois might have done had he lived a few years more.(Abstract)
    P. Vanchinathan
    VIT Chennai.

  • 19-02-24
    Computer Science Seminar
    Date: Monday, 19 February 2024
    Time: 2:00 to 3:00 PM
    Venue: Seminar Hall
    Sanskrit Computational Linguistics: Tools, Annotation and Knowledge Graphs(Abstract)
    Hrishikesh Terdalkar
    IIT Kanpur.

  • 19-02-24
    Physics Seminar
    Date: Monday, 19 February 2024
    Time : 1.45 PM
    Venue: Lecture Hall 05
    CFT analysis of N=4 Super Yang Mills at Strong Coupling
    Nika Sokolova
    Kings College, London.

  • 16-02-24
    Physics Seminar
    Date: Friday, 16 February 2024
    Time: 1.45 PM
    Venue: Lecture Hall 05
    Introduction to Quantum Spectral Curve
    Julius Julius
    HRI.

  • 14-02-24
    CMI Arts Initiative
    Date: Wednesday, 14 February 2024
    Time: 6.30 PM
    Venue: Virtual Mode
    Estuary: A Fictional Commentary on Educational Spaces(Abstract)
    Perumal Murugan and Nandini Krishnan
    Chennai Mathematical Institute Arts Initiative.

  • 14-02-24
    Mathematics Colloquium
    Date: Wednesday, 14 February 2024
    Time: 2.00 - 3.00 PM
    Venue: Seminar Hall
    Delta geometry and the characteristic polynomial of the Frobenius(Abstract)
    Arnab Saha
    IIT Gandhinagar.

  • 21-02-24
    Prof. Michelle Gallo's Lecture Series
    Date: 12, 14, 19 and 21 February 2024 @ 11.50 AM ,20 February 2024 @ 3.30 PM
    Venue: Seminar Hall
    Tensor Data Analysis(Abstract)
    Michelle Gallo
    University of Naples, Italy.

  • 13-02-24
    CMI-IMSc Number Theory Seminar
    Date: Tuesday, 13 February 2024
    Time: 12.00 - 1.00 PM
    Venue: Lecture Hall 803
    Counting extensions of number fields(Abstract)
    Rajdeep Ghosh
    Chennai Mathematical Institute.

  • 09-02-24
    Data Science Seminar
    Date: Friday, 09 February 2024
    Time: 2:00 PM - 3:00 PM
    Venue: NKN Hall
    PseudoGA: a pseudo time reconstruction method using single-cell RNA-seq data(Abstract)
    Indranil Mukhopadhyay
    ISI Kolkata.

  • 09-02-24
    Computer Science Seminar
    Date: Friday, 09 February 2024
    Time: 2:00 - 3:00 PM
    Venue: Lecture Hall 5
    Cascade Decomposition of Asynchronous Automata(Abstract)
    Paul Gastin
    LMF, CNRS & ENS Paris-Saclay.

  • 08-02-24
    Physics Seminar
    Date: Thursday, 8 February 2024
    Time: 1:45 PM
    Venue: Lecture Hall 1
    Local Entropy Current on a Black-Hole Horizon and its Reparametrizations(Abstract)
    Shuvayu Roy
    NISER, Bhubaneswar.

  • 07-02-24
    Mathematics Colloquium
    Date: Wednesday, 7 February 2024
    Time: 2:00 - 3:00 PM
    Venue: Seminar Hall
    Big Match(Abstract)
    TES Raghavan
    University of Illinois, Chicago.

  • 06-02-24
    Seminar Announcement
    Date: Tuesday, 6 February 2024
    Time: 3: 30 PM
    Venue: Seminar Hall
    Sparsification and Uncertainty: Through Geometric Lens(Abstract)
    Sujoy Bhore
    IIT Bombay.

  • 06-02-24
    Physics Seminar
    Date: Tuesday, 06 February 2024
    Time: 1:45 PM
    Venue: Lecture Hall 1
    An entropy current and the second law in higher derivative theories of gravity(Abstract)
    Prateksh Dhivakar
    IIT Kanpur.

  • 02-02-24
    Data Science Seminar
    Date: Friday, 2 February 2024
    Time: 2:00 PM
    Venue: NKN Hall
    When to use Linear Regression? Model assumptions, diagnostics, and robustness(Abstract)
    Miheer Dewaskar
    Duke University, USA.

  • 01-02-24
    Mathematics Seminar
    Date: Thursday, 1 February 2024
    Time: 3:30 PM
    Venue: NKN Hall
    Robustifying likelihoods by optimistically re-weighting data(Abstract)
    Miheer Dewaskar
    Duke University, USA.

  • 31-01-24
    Mathematics Colloquium
    Date: Wednesday, 31 January 2024
    Time: 3:30-4:30 pm
    Venue: Seminar Hall
    Power and Limitations of Opinion Polls(Abstract)
    Rajeeva Karandikar
    Chennai Mathematical Institute.

  • 31-01-24
    Seminar Announcement
    Date: Wednesday, 31 January 2024
    Time: 10:30 - 11:30 AM
    Venue: Lecture Hall 5
    Complexity Study of Reasoning about Knowledge and Public Observations(Abstract)
    Avijeet Ghosh
    ISI Kolkata.

  • 24-01-24
    Algebraic Methods in Algorithms, Complexity Theory and Combinatorics (AACC) Seminar Series
    Every Wednesday, from 12:00 to 1.15 PM
    Starts on 17 January 2024
    Venue: Lecture Hall 6
    AACC Seminar Series(Abstract)
    Rohit Gurjar, Sumanta Ghosh, Amit Sinhababu
    Chennai Mathematical Institute.

  • 22-01-24
    Seminar Announcement
    Speaker: Sourav Chakraborty, ISI Kolkata
    Date: Monday, 22 January 2024
    Time: 2:00 PM
    Venue: Lecture Hall 2
    Distinct Elements in Streams and the Klee's Measure Problem(Abstract)
    Sourav Chakraborty
    ISI Kolkata.

  • 22-01-24
    Physics Seminar
    Date: Monday, 22 January 2024
    Time: 12:00 PM
    Venue: Seminar hall
    Quantifying animal encounter and interactions: Lattice random walk approach(Abstract)
    Debraj Das
    ICTP, Trieste.

  • 19-01-24
    Data Science Seminar
    Date: Friday, 19 January 2024
    Time: 2:00 PM
    Venue: NKN Hall
    Model Risk: The perils of quantification(Abstract)
    Anirban Dutta
    DWS, Pune.

  • 18-01-24
    Physics Seminar
    Speaker : Sachin Grover, HRI, Allahabad
    Date: Thursday, 18 January 2024
    Time: 1.45 PM
    Duality defects in $D_n$ type Niemeier lattice CFTs
    Sachin Grover
    HRI, Allahabad.

  • 17-01-24
    Mathematics Seminar
    Date: Wednesday, 17 January 2024
    Time: 3:30 PM
    Venue: Seminar Hall
    Representation homology of spaces and the strong Macdonald conjectures(Abstract)
    Ajay Ramadoss
    Indiana University, Bloomington.

  • 17-01-24
    Seminar Announcement
    Date: Wednesday, 17 January 2024
    Time: 3:30 PM
    Venue: Lecture Hall 1
    Covering a graph using shortest paths(Abstract)
    Florent Foucaud
    Universitaire des Cézeaux, France.

  • 12-01-24
    Public viva-voce Notification
    Date: Friday, 12 January 2024
    Time: 11:00 AM
    Venue: Seminar Hall
    On the structure of certain non-commutative $C^{\ast}$-algebras(Abstract)
    Malay Mandal
    Chennai Mathematical Institute.

  • 11-01-24
    Physics Seminar
    Date: Thursday, 11 January 2024
    Time: 12:15 PM
    Venue: Lecture Hall 06
    CSS codes and dualities via cluster state measurements(Abstract)
    Aswin P. M.
    Stony Brook University.

  • 10-01-24
    Seminar Announcement
    Date: Wednesday, 10 January 2024
    Time: 2:00 PM
    Venue: Lecture Hall 5
    Proof theory of formal languages(Abstract)
    Abhishek De
    Research Fellow in Proof Theory, University of Birmingham.

  • 24-01-24
    Lecture Series Announcement
    Date: 5, 9, 11, 16, 18, 19, 22, 23, 24, 25 January 2024
    Time: 3:30 PM
    Venue: Seminar Hall. The lectures will be given in hybrid mode.
    Lectures on SGA3(Abstract)
    Patrick Polo
    Institut de Mathématiques, Université Pierre et Marie Curie, Paris.

  • 08-01-24
    Mathematics Seminar
    Date: Monday, 8 January 2023
    Time: 2:00 PM
    Venue: Seminar Hall
    SU(2) Representations of Three-Manifold groups(Abstract)
    Deepraj Bhat
    MIT, USA.

  • 05-01-24
    Seminar Announcement
    Date: Friday, 5 January 2024
    Time: 3.30 PM
    Venue: Lecture Hall 06
    Reachability in Continuous Pushdown VASS(Abstract)
    Ramanathan S Thinniyam
    Uppsala University.

  • 05-01-24
    Seminar Announcement
    Date: Friday, 5 January 2024
    Time: 2:00 PM
    Venue: Seminar Hall
    The Antiquity of the Arithmetic Mean(Abstract)
    Amartya Kumar Dutta
    ISI Kolkata.