Faculty details

Prof.Himadri Halder

Designation: Assistant Professor

Department: Mathematics & Computing

Email: himadrihalder[at]iitism[dot]ac[dot]in

Contact Number:

Office Number: +91-326-223-5464

Personal Page: Click Here

Research Interest: Complex Analysis, Functional Analysis

Teaching

Teaching at IIT (ISM) Dhanbad:

Current:

  1. NMCI101: Engineering Mathematics I (Monsoon semester 2026).
  2. NMCD401 & NMCD526: Complex Analysis (Monsoon semester 2026), jointly with Prof. Neeru Bala.

 

Academics

  • Ph.D. (Mathematics): Indian Institute of Technology Bhubaneswar (January 2019--October 2022); Supervisor: Prof. Vasudeva Rao Allu
  • M.Sc. (Mathematics):  Indian Institute of Technology Bombay (July 2016--June 2018)
  • B.Sc. (Mathematics):  Ramakrishna Mission Residential College, Narendrapur (affiliated to the University of Calcutta) (July 2013--June 2016)

Position

  • Assistant Professor in the Department of Mathematics & Computing, IIT (ISM) Dhanbad, India (April 2026 to date).
  • NBHM Postdoctoral Fellow at  the Department of Mathematics, IISc Bangalore (February 2026 to April 2026); Mentor: Prof. Apoorva Khare
  • Visiting Scientist at the Stat-Math Unit, ISI Bangalore (October 2025 to January 2026); Mentor: Prof. B. V. Rajarama Bhat
  • Senior Project Associate at the Department of Mathematics of IIT Bombay (April 2025 to October 2025); Mentor: Prof. Sourav Pal
  • Institute Postdoctoral Fellow at the Department of Mathematics of IIT Bombay (February 2023 to March 2025); Mentor: Prof. Sourav Pal

Awards and Honors

  • Post-Doctoral Fellowship by the National Board for Higher Mathematics (NBHM) in the June 2025 selection cycle.
  • Subhash Bhatt Award (jointly with Prof. Vasudeva Rao Allu) for the year 2025 from the Indian Mathematical Society during their 91st Annual Conference meeting held at the Department of Mathematics, Lucknow University, Lucknow, Uttar Pradesh.

Publications

List Of Research Publications (only in Peer-reviewed Journals)

Manuscripts under review: 
  1. Himadri Halder and Rohit Kumar, Gabriel's and Frazer's problems for weighted Bergman spaces and their applications, https://arxiv.org/abs/2607.13543 

  2. Himadri Halder and Rohit Kumar, Riesz Theorem and Riesz-Fejér inequality for weighted harmonic Bergman spaces with applications to Möbius invariant spaces, https://arxiv.org/abs/2607.11795 

  3. Himadri Halder, Vector valued pluriharmonic functions within the framework of local Banach space theory and their applications, preprint.

  4. Himadri Halder, Arithmetic Bohr radius and local Banach space theory, https://arxiv.org/abs/2512.19411 

  5. Himadri Halder, Local Banach space theoretic approach to Bohr's theorem for vector valued holomorphic and pluriharmonic functions, https://arxiv.org/abs/2512.09091

Published/Accepted Papers: 
  1. Vasudevarao Allu, Himadri Halder and Subhadip Pal, Multidimensional Bohr radii for holomorphic functions with values in complex Banach spaces, Complex Analysis and Operator Theory, 20 (2026), Article no. 97. DOI: https://doi.org/10.1007/s11785-026-01952-2 

  2. Molla Basir Ahamed, Vasudevarao Allu and Himadri Halder, Bohr inequalities for the class of unimodular bounded functions on shifted disks, Bulletin des Sciences Mathématiques  199 (2025),  Paper No. 103577, DOI: https://doi.org/10.1016/j.bulsci.2025.103577  

  3. Vasudevarao Allu, Himadri Halder and Subhadip Pal, Arithmetic Bohr radius for the Minkowski space, Forum Mathematicum 37 (2025), 987-995. DOI: https://doi.org/10.1515/forum-2023-0425 

  4. Vasudevarao Allu and Himadri Halder, Bohr phenomenon for harmonic Bloch functions, Analysis Mathematica 51 (2025), 35-62. DOI: https://doi.org/10.1007/s10476-025-00063-y 

  5. Molla Basir Ahamed, Vasudevarao Allu and Himadri Halder, An Asymptotic behaviour of Bohr's Radii for Polynomials on simply connected domains, C. R. Math. Acad. Sci. Paris 363 (2025), 1047-1058. DOI: https://doi.org/10.5802/crmath.625 

  6. Vasudevarao Allu and Himadri Halder, Landau's theorem for harmonic Bloch functions on simply connected domains, Complex Variables and Elliptic Equations 70 (2025), 213-227. DOI: https://doi.org/10.1080/17476933.2023.2298834 

  7. Vasudevarao Allu and Himadri Halder, Bohr radius for Banach spaces on simply connected domains, Proceedings of the Edinburgh Mathematical Society 67 (2024), 113-141. DOI: https://doi.org/10.1017/S0013091523000688 

  8. Vasudevarao Allu and Himadri Halder, Bohr operator on operator valued polyanalytic functions on simply connected domains, Canadian Mathematical Bulletin 66 (2023), 1411-1422, DOI: http://dx.doi.org/10.4153/S0008439523000541

  9. Vasudevarao Allu, Himadri Halder and Subhadip Pal, Bohr and Rogosinski inequalities for operator valued holomorphic functions, Bulletin des Sciences Mathématiques 182 (2023) 103214. DOI: https://doi.org/10.1016/j.bulsci.2022.103214  

  10. Molla Basir Ahamed, Vasudevarao Allu and Himadri Halder, Improved Bohr inequalities for certain class of harmonic univalent functions, Complex Variables and Elliptic Equations 68 (2023), 267--290. DOI: https://doi.org/10.1080/17476933.2021.1988583 

  11. Vasudevarao Allu and Himadri Halder, Operator valued analogues of multidimensional Bohr's inequality, Canadian Mathematical Bulletin 65 (2022), 1020--1035. DOI: https://doi.org/10.4153/S0008439521001077 

  12. Vasudevarao Allu and Himadri Halder, The Bohr inequality for certain harmonic mappings, Indagationes Mathematicae 33 (2022), 581--597. DOI: https://doi.org/10.1016/j.indag.2021.12.004 

  13. Vasudevarao Allu and Himadri Halder, Bohr phenomenon for certain close-to-convex analytic functions, Computational Methods and Function Theory 22 (2022), 491--517.  DOI: https://doi.org/10.1007/s40315-021-00412-6 

  14. Vasudevarao Allu and Himadri Halder, The Bohr phenomenon for certain Subclasses of Harmonic Mappings, Bulletin des Sciences Mathématiques 173 (2021), Paper No. 103053, 18 pp., DOI: https://doi.org/10.1016/j.bulsci.2021.103053 

  15. Molla Basir Ahamed, Vasudevarao Allu and Himadri Halder, The Bohr Phenomenon for analytic functions on simply connected domains, Annales Fennici Mathematici 47(2021), 103--120.  DOI: https://doi.org/10.54330/afm.112561 

  16. Molla Basir Ahamed, Vasudevarao Allu and Himadri Halder, Bohr radius for certain classes of close-to-convex harmonic mappings, Analysis and Mathematical Physics 11 (2021), no. 3, Paper No. 111, 30 pp. DOI: https://doi.org/10.1007/s13324-021-00551-y 

  17. Vasudevarao Allu and Himadri Halder, Bohr radius for certain starlike and convex univalent functions, Journal of Mathematical Analysis and Applications 493 (2021), 124519. DOI: https://doi.org/10.1016/j.jmaa.2020.124519  

Projects & Activities

Guidance

Current Ph.D Students:
  • Madhumita Sabui (CSIR) (July 2026--Present).

  • Sayantan Barik (Institute Fellowship) (July 2026--Present).