| Friday 30 May 2025 | |
| Events for day: Wednesday 27 September 2023 |
| 14:00 - 15:00 Combinatorics and Computing Weekly Seminar Skew Types of Skew Hadamard Matrices School MATHEMATICS A Hadamard matrix $H$ is said to be skew Hadamard if $H+H^t=2I$, where I is the identity matrix. Skew Hadamard matrices are useful in constructing several combinatorial objects, such as association schemes, self-dual codes, and strongly regular graphs. The notions of type and profile have been proved to be very useful in classification and equivalence check of Hadamard matrices. Here, we define skew type for skew Hadamard matrices. We make use of it to classify some types of skew Hadamard matrices of order $36$. This is a joint work with Hadi Kharaghani and Ali Mohammadian. https://us06web.zoom.us/j/83407340293?pwd=cXarB4geU ... 16:00 - 17:00 Mathematics Colloquium How to Construct Free Boundary Problems from Simple Optimization Problems School MATHEMATICS I will start by displaying a model of a free boundary problem which by now belongs to the folklore. Then, I will go over some well-known facts in regard to the Poisson problem with zero Dirichlet boundary conditions. Finally, I will introduce the optimization problems which will lead us to the aforementioned free boundary problems. Some open problems and intriguing questions will be shared as well. Subscribing the Mathematics Colloquium mailing list: https://groups.google.com/g/ipm-math-colloquium Venue: Niavaran, Lecture Hall 1 ... |