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INDIAN INSTITUTE OF TECHNOLOGY PALAKKAD
Kanjikode | Palakkad | Kerala - 678623
0491 209 2001 (Office) | info@iitpkd.ac.in

Main Navigation

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Dr. M. Ashok Kumar
Associate Professor
Mathematics
Research Area: Information Theory, Statistics, and Probability
  • Biosketch

    Dr Ashok Kumar received his bachelor's and master's degrees in Mathematics from the Manonmaniam Sundaranar University, Tirunelveli, in 1999 and 2001 respectively. He passed the CSIR-UGC (NET) for lectureship in Mathematical Sciences in 2001 and started lecturing Mathematics in various educational institutions until December 2007. During this period he developed an interest in Applied Mathematics. He obtained the CSIR-UGC (NET) for JRF in December 2007 and joined for a Ph.D programme in the department of Electrical Communication Engineering of the Indian Institute of Science, Bangalore, under the supervision of Prof. Rajesh Sundaresan. He completed his Ph.D in October 2014. Subsequently, he was a Visiting Scientist at the Stat-Math Unit of the Indian Statistical Institute, Bangalore from December 2014 to May 2015 and a post-doctoral fellow at the department of Electrical Engineering of the Technion-Israel Institute of Technology from May 2015 to December 2015 under the mentorship of Prof. Igal Sason. He was with the discipline of Mathematics of IIT Indore from January 2016 to May 2018. He has been with the department of Mathematics, IIT Palakkad since June 2018.

  • Research

     

    Orthogonal Intersection of a Power-Law Family and a Linear Family
    Orthogonal Intersection of Power-Law and Linear Models

     

    ----------------------------------------------------------------------------------------------------

    Broadly I work at the intersection of information theory, statistics and probability

    Some key words: measures of information, Renyi entropy, robust statistical inference, distance based inference, large deviations theory, maximum entropy, information geometry.

     

    Recent Work:

    • Generalized Fisher-Darmois-Koopman-Pitman Theorem and Rao-Blackwell Type Estimators for Power-Law Distributions (with Atin Gayen), published in IEEE Transactions on Information Theory (2023)

    • Are Guessing, Source Coding, and Tasks Partitioning Birds of a Feather? (with Albert Sunny, Ashish Thakre, Ashisha Kumar and G. Dinesh Manohar), published in Entropy (2022)

    • Information Geometry and Classical Cramér-Rao Type Inequalities (with KV Mishra), in handbook of Statistics Vol. 45 (2021)

  • Teaching
    • MA5007: Probability & Statistics (Sep. 2020 - Jan. 2021, Aug-Dec 2021, Aug-Dec 2022, Aug-Dec 2023, Aug-Dec 2024)
    • EE5517: Information Theory and Statistics (Jan-May 2022, Jan-May 2023)
    • MA1011: Linear Algebra and One-Variable Calculus (Nov. 2021 - Feb. 2022)
    • MA2040: Probability, Stochastic Processes and Statistics (July 2018, July 2019, January 2020, Feb-May 2021)
    • MA2032: Numerical Analysis (January 2019)
    • MA6001: Probability Theory (January 2020)
  • Research Group

    We are looking for well motivated (that is, doing research in Mathematics is a goal in life) PhD students in the areas of Mathematical Statistics, Information Theory, Information Geometry, and Probability.

    Interested candidates are strongly encouraged to get in touch with me by solving the problems (as many as possible) put up in this link and submit them (scanned copy of hand-written one or latexed one) by email to ashokm[at]iitpkd[dot]ac[dot]in.

    (Remember that, it is not necessary that you should have answered the questions completely. You can submit partial solutions also. What we would like to see is your efforts to solve the problems.)

    Interested candidates are also strongly encouraged to look at some or all of our recent works mentioned under 'Research' above to get an idea of the kind of works that we are doing.

     

    Internships Currently Unavailable:
    Due to various ongoing responsibilities, I am not offering internships at this time. As a result, I may not be able to respond to emails regarding internship inquiries. Thank you for your understanding.

     

    Current Students

     

    PhD:

         1. Satyajit Dhadumia (since August 2021)

          2. Santu Sarkar (since August 2022)

     

    Masters:

     

         1. Vinita Jakhar (M.Sc Math, since August 2024)

     

     

    Past Students

     

    PhD:

         1. Atin Gayen (2016 - 2022, Title of the thesis: Generalized Maximum Likelihood Estimation on Power-Law Distributions: Projection Theorems, Principle of Sufficiency and Cramer-Rao Bounds)

     

    Masters:

         1. Balram Sharma (M.Sc Math, since Aug - Dec. 2024)

         2  Koushik Bhattacharjee (M.Sc Math, 2022 - 2023)

         3. Shashank Jain Doraya (M.Sc Math, 2022 - 2023)

         4. Milan Chakraborty (MTech Computing and Mathematics, 2022 - 2023)

         5. Santanu Roy (MTech Datascience, 2022 - 2023)

         6. Christo Babu (M.Sc Math, 2021 - 2022)

         7. Kiranmai Guguloth (M.Sc Math, 2021 - 2022)

         8. Shree Ganesha Sharma M S (M.Tech Data Science, 2020 - 2022)

         9. Ajesh Mon R (M.Tech Data Science, 2020 - 2022)

        10. Gaurav Kandpal (M.Sc Math, 2020 - 2022)

     

    Other Students:

         1. Vishnu Mohanan (Summer Intern, CUSAT, Kerala, June 2019)

         2. Ashish Thakre (M.Sc. Mathematics at IIT Indore, 2016 - 2018)

         3. Shubham Thakur (Summer Intern, IIT Guwahati, June 2017)

         4. Manikandan C. (June 2018 - October 2020)

     

  • Additional Information
    Title
    Awards/Grants
    Description
    • SERB-MATRICS project on 'Information Geometric Approach to Estimation Error Bounds' for the period 2023 - 2025.

    • SERB's VAJRA award jointly with Prof. Michel Broniatowski of UPMC, Paris, France (2017 - 2018 and 2020 - 2021.)

    • Travel grant from SERB for ISIT 2018.

    • Best paper award for Relative alpha-Entropy Minimizers Subject to Linear Statistical Constraints, appeared in the Proceedings of the 2015 National Conference on Communication (NCC 2015), held at IIT Bombay, Mumbai, India, during February - March 2015.

  • Publications
    Generalized Fisher-Darmois-Koopman-Pitman Theorem and Rao-Blackwell Type Estimators for Power-Law Distributions
    Atin Gayen and M. Ashok Kumar
    IEEE Transactions on Information Theory 69 (12) 7565 - 7583 (2023)
    Are Guessing, Source Coding and Tasks Partitioning Birds of A Feather?
    M. Ashok Kumar, Albert Sunny, Ashish Thakre, Ashisha Kumar, and G. Dinesh Manohar
    Entropy 24 (11) (2022)
    A Unified Framework for Problems on Guessing, Source Coding, and Tasks Partitioning
    M. Ashok Kumar, Albert Sunny, Ashish Thakre, Ashisha Kumar, and G. Dinesh Manohar
    2022 IEEE International Symposium on Information Theory (2022)
    Information geometry and classical Cramér–Rao-type inequalities
    Kumar Vijay Mishra and M. Ashok Kumar
    Handbook of Statistics 45 79-114 (2021)
    Projection theorems and estimating equations for power-law models
    Atin Gayen and M. Ashok Kumar
    Journal of Multivariate Analysis 184 (104734) (2021)
    Generalized Bayesian Cramér-Rao Inequality via Information Geometry of Relative α-Entropy
    K V Mishra and M. Ashok Kumar
    2020 54th Annual Conference on Information Sciences and Systems (CISS) 1-6 (2020)
    Cram\'er-Rao Lower Bounds Arising from Generalized Csisz\'ar Divergences
    M. Ashok Kumar and K. Vijay Mishra
    Information Geometry 3 (1) 33-59 (2020)
    Composite Tests under Corrupted Data
    Michel, B., Jana, J., Ashok Kumar, M., Emilie, M.
    Entropy 21 (1) (63) 1-23 (2019)
    Information Geometric Approach to Bayesian Lower Error Bounds
    M. Ashok Kumar and Kumar Vijay Mishra
    IEEE International Symposium on Information Theory (2018)
    Generalized Estimating Equation for the Student-t Distributions
    Atin Gayen and M. Ashok Kumar
    IEEE International Symposium on Information Theory (2018)
    Projection theorems for the Renyi divergence on alpha-convex sets
    M. Ashok Kumar and Igal Sason
    IEEE Transactions on Information Theory 62 (9) 4924 - 4935 (2016)
    Minimization Problems Based on Relative alpha-Entropy II: Reverse Projection
    M. Ashok Kumar and Rajesh Sundaresan
    IEEE Transactions on Information Theory 61 (9) 5081 - 5095 (2015)
    Minimization Problems Based on Relative alpha-Entropy I: Forward Projection
    M. Ashok Kumar and Rajesh Sundaresan
    IEEE Transactions on Information Theory 61 (9) 5063 - 5080 (2015)

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