Mar 14, 2024: Celebration of International Day of Mathematics, Assam University, Silchar Title: Computing Π and Riemann zeta function Mar 14, 2024 : Pi-Day celebration, Pandit Deendayal Energy University, Gandhinagar Title: Euler's proof of $\sum\limits_{n=1}^{\infty}\frac{1}{n^2}= \frac{\pi ^2}{6}$ Dec 24, 2023 : 89th Annual Conference of the Indian Mathematical Society, BITS Pilani at Hyderabad, Subhash Bhatt Award Lecture Title: Total positivity: characterizations and connections Dec 22, 2023 : 38th Annual Conference of the Ramanujan Mathematical Society, Indian Institute of Technology Guwahati Title: Blowup polynomials of graphs Jul 14, 2023: University of Regina, Colloquium Title: Blowup polynomials of graphs Mar 6–8, 2023: National Centre for Mathematics Workshop on Operator Theory and Operator Algebra, Indian Institute of Technology Gandhinagar Title: Totally nonnegative (TN) and totally positive (TP) matrices Dec 22, 2022: National Mathematics Day Program, Babasaheb Bhimrao Ambedkar University, Lucknow Title: Google's PageRank Algorithm Nov 07, 2022: Indian Institute of Technology Gandhinagar, GANIT Seminar Title: Blowup polynomials of graphs Jul 21, 2022: 34th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2022, Satellite of ICM-2022), Indian Institute of Science, Talk Title: Blowup polynomials and delta-matroids of graphs Jun 21, 2022: International Linear Algebra Society (ILAS) 2020 Meeting, National University of Ireland, Galway LAA early career speaker Title: Blowup polynomials of graphs Dec 10, 2021: Indian Institute of Technology Kharagpur, Seminar on Graphs, Matrices and Applications Title: Blowup polynomials of graphs Jul 21, 2021: Applied Matrix Positivity, ICMS (Edinburgh, Scotland) Title: Total positivity: characterizations and connections Feb 05, 2021: University of Maryland, Baltimore County, Optimization Seminar Title: N-matrices: Detection, construction and connection to LCP Feb 28, 2020: Indian Institute of Science Education and Research Kolkata, DMS seminar Title: Distance matrices of trees: invariants, old and new Feb 7, 2020: Indian Institute of Technology Kharagpur, Colloquium Title: Distance matrices of trees: invariants, old and new Jan 8, 2020: Indian Statistical Institute at Delhi, Stat-Math Unit Seminar Title: Distance matrices of trees: invariants, old and new Dec 26, 2019: Conference on Linear Algebra and its Applications (in honour of Ravindra B. Bapat's 65th birthday), Indian Statistical Institute at Delhi Title: Matrix Arithmetic Mean-Geometric Mean Inequalities Oct 21, 2019: Indian Institute of Technology Bombay, Combinatorics Seminar Title: Distance matrices of trees: invariants, old and new Aug 01, 2019: Indian Statistical Institute at Bangalore, Colloquium Title: Distance matrices of trees: invariants, old and new Mar 28, 2019: In-house Symposium, Indian Institute of Science, Bengaluru Title: Distance matrices of trees: invariants, old and new Jun 22, 2018: International Conference on Analysis and Applications, Indian Institute of Technology Madras Title: Linear preservers on semipositive and minimal semipositive matrices Dec 12, 2017: International Conference on Linear Algebra and its Applications (ICLAA), Centre for Advanced Research in Applied Mathematics and Statistics, Manipal Academy of Higher Education, Manipal Title: Matrix semipositivity revisited Nov 10, 2017: In-house Symposium, Indian Institute of Technology Madras Title: Matrix Arithmetic Mean-Geometric Mean Inequalities Jul 26, 2017: International Linear Algebra Society (ILAS) 2017 Meeting, Iowa State University, Ames Title: Matrices with positive semidefinite real part Jun 10, 2016: Workshop and Conference on Game Theory and Optimization, Indian Institute of Technology Madras Title: The equivalence of Tucker's theorem for almost skew-symmetric matrices and Farkas' lemma