Set Theories in Parallel Universes, ML Seminar: Forschungsseminar Mathematische Logik, organized by Department of Mathematics, University of Hamburg, Germany, August 1, 2025.
Axiomatic Set Theory, National Workshop on Mathematical Logic and Applications (NWMLA- 2024), organized by Department of Mathematics, Gauhati University, Guwahati, Assam, India in collaboration with Sivatosh Mookerjee Science Centre, Asutosh Mookerjee Memorial Institute, Kolkata, India, December 26 - 28, 2024.
Algebra-Valued Models of Non-Classical Set Theories: A Focus on Paraconsistency, Workshop on Paraconsistent Reasoning (An assembly of researchers from India and abroad), In memory of Professor Newton da Costa, organized by Calcutta Logic Circle in collaboration with Department of Mathematics, Ramakrishna Mission Residential College, Narendrapur, India, August 17 - 18, 2024.
Algebra-Valued Models 1: Non-Classical Foundation, Kickoff Workshop of a New Generation Project, organized by the Institute of Philosophy and Human Sciences (IFCH), University of Campinas, Sao Paulo, Brazil, August 1 - 2, 2024.
"=" and "∈" in logic and set theory, International Seminar on Relevance of Predicate Logic and Mathematical Logic in Today's Life, organized by the Department of Philosophy, Sonarpur Mahavidyalaya, Kolkata, India, July 19, 2024.
Is classicality mandatory to develop basic mathematics? National Seminar on Algebra, Analysis, Discrete Mathematics and their Application, organized by the Department of Mathematics, Sri Chaitanya College, Habra, Ashok Nagar, India, April 3, 2024.
Cardinality in a parallel universe and a question, World Logic Day Celebration by ALI 2024, organized by the Association for Logic in India and supported by Madras School of Economics and The Institute of Mathematical Sciences, Chennai, India, January 20, 2024.
A road to non-classical models of set theory, Workshop: Applications of Algebra-Valued Models, organized by the Department of Philosophy, Classics, History of Art and Ideas, University of Oslo, Norway, November 9 - 10, 2023.
Basic mathematics beyond classicality, 22nd Annual Conference of Calcutta Logic Circle 2023, organized by Calcutta Logic Circle in collaboration with Ramakrishna Mission Residential College (Autonomous), Narendrapur, India, August 12 - 14, 2023.
Do we need numbers to count?, A Seminar on ``Mathematics - Understanding the Fundamentals", organized by the Department of Mathematics, Taki Government College, Taki, India, 8 May, 2023.
ZF between classicality and non-classicality, Logic Colloquium 2021, European Summer Meeting of the Association for Symbolic Logic, Poznan, Poland, July 19 - 24, 2021.
Constructing illoyal algebra-valued models of set theory, Annual Conference of the Australasian Association for Logic, virtually hosted by the University of Queensland and the University of Melbourne, Australia, June 23 - 25, 2021.
What is a set?, A National Webinar on ``A Few Basic Foundational Aspects of Mathematics", organized by the Department of Mathematics, Sree Chaitanya College, Habra, India, 18 June & 25 June, 2021.
ZF between classicality and non-classicality, UNICAMP-Konstanz Philosophy of Set Theory Seminar, organized jointly by the University of Campinas, Brazil and the University of Konstanz, Germany, 11 March - 24 June, 2021.
Quotient models for a class of non-classical set theories, 9th Indian Conference on Logic and its Applications (ICLA 2021), organized online by the Association for Logic in India, March 4 - 7, 2021.
Models of non-classical set theories, organized by the Association for Logic in India under the Conseil International de Philosophie et des Sciences Humaines (CIPSH), UNESCO, on the occasion of World Logic Day, 14 January, 2021.
Cardinality in a model of paraconsistent set theory, Studies in Mathematical Logic, University of Sao Paulo, Brazil, December 5 - 6, 2019.
Foundations of mathematics in a model of paraconsistent set theory, Logic Colloquium, 2019, European Summer Meeting of the Association for Symbolic Logic, Prague, Czech Republic, August 11 - 16, 2019.
Constructing illoyal algebra-valued models of set theory, 16th International Congress on Logic, Methodology and Philosophy of Science and Technology, Prague, Czech Republic, August 5 - 10, 2019.
Paraconsistent set theory, Pre-conference workshop, 8th Indian Conference on Logic and its Applications (ICLA 2019), Department of Computer Science and Engineering, Indian Institute of Technology (IIT), Delhi, India, March 1 - 5, 2019.
Logic of an algebra A and the logic of V(A), 19th Annual Seminar on Logic and its Applications, Department of Pure Mathematics, University of Calcutta, Kolkata, India, October 13 - 15, 2017.
A three-valued paraconsistent logic LPS3, Merging Borders in Logic and Philosophy of Mathematics, Department of Philosophy, University of North Bengal, North Bengal, India, 17 November, 2016.
A paraconsistent set theory, International Seminar on History and Philosophy of Mathematics II: Pluralism in Mathematics, Ramakrishna Mission Institute of Culture, Gol Park, Kolkata, India, December 10 - 12, 2015.
Natural numbers in a model of some paraconsistent set theory, Annual Meet of Calcutta Logic Circle: Logic and its Applications, Indian Institute of Bio-Social Research and Development, Kolkata, India, November 6 - 8, 2015.
Non-classical set theories and logics associated with them, Institute of Mathematical Sciences, Chennai, India, 23 June, 2015.
Ordinals in an algebra-valued model of a paraconsistent set theory, 6th Indian Conference on Logic and its Applications, Indian Institute of Technology (IIT), Bombay, India, January 8 - 10, 2015.
A glimpse of paraconsistent logic(s) and LPS3, International Seminar on History and Philosophy of Mathematics 2014, Bose Institute, Kolkata, India, February 20 - 22, 2014.
A paraconsistent logic obtained from an algebra-valued model of set theory, 5th World Congress on Paraconsistent Logic, Indian Statistical Institute, Kolkata, India, February 13 - 17, 2014.
A new three valued paraconsistent logic, International Seminar on Logic and Cognition (SLC 2013), Jadavpur University, Kolkata, India, 30 October - 1 November, 2013.
The logic LS3 and its comparison with other three-valued paraconsistent logics, 13th Asian Logic Conference (ALC 2013), Sun Yat-sen University, Guangzhou, China, September 16 - 20, 2013.
The Boolean-valued model construction with algebras of non-standard logics, Postgraduate Workshop on Alternative Set Theory, University of Amsterdam, Amsterdam, The Netherlands, June 22 - 24, 2013.
Set theory, Annual Meet on Logic and its Application: Celebrating the Alan Turing Year, Indian Institute of Bio-Social Research and Development, Kolkata, India, 29 September - 1 October, 2012.
Algebra-valued models of set theories, Semantics and Syntax: A Legacy of Alan Turing, Isaac Newton Institute for Mathematical Science, Cambridge University, Cambridge, UK, 9 January - 6 July, 2012.
Foundation of mathematics, Reading Russell on the Centenary of Principia Mathematica (1910 - 1913), Rabindra Bharati University in Collaboration with Indian Council of Philosophical Research, Kolkata, India, January 24 - 25, 2012.