| Wednesday 15 January 2025 | |
| Events for day: Wednesday 01 November 2023 |
| 11:00 - 12:00 Wednesday Weekly Seminar - meeting M-type cathode School PARTICLES AND ACCELERATORS Abstract: To address the challenges associated with oxide cathodes, dispenser cathodes were introduced as a solution starting in the 1950s. Notably, in 1966, a groundbreaking dispenser cathode known as the M-type cathode was introduced, marking a significant advancement by tripling the current density. Today, the M-type cathode has established itself as one of the most commonly employed thermionic cathodes, capable of consistently delivering a current density of 12 amps/cm² over an impressive ten thousand hours of operation.The manufacturing process of the M-type cathode holds the potential for significant insights into the fun ... 12:45 - 13:45 Geometry and Differential Equations Seminar PDEs with Irregular Data School MATHEMATICS We are going to review some well-known results in elliptic PDEs involving solutions that are not expected to be smooth. The model equation, during the talk, will be the Laplacian with an arbitrary finite Borel measure on the right-hand side. Venue: Niavaran, Lecture Hall 1 ... 13:30 - 15:00 Weekly Seminar The Mystery of Multiple Stellar Populations (MSPs) in Globular Clusters (GCs) School ASTRONOMY Globular Clusters (GCs) are spherical collections of hundreds of thousands of low-metallicity ([Fe/H]? 1 ), low-mass (? 0.75 M? ), and old (? 1Gyr) stars that are rotating around the galaxies. They can provide useful information from the early universe (z>2) and are known as the fossils of the astronomical world. Traditionally, it was assumed that all stars within GCs have similar chemical compositions. However, recent observations have revealed that they display anomalous variations in light elements, not expected to be formed in low-mass stars during stellar evolutionary processes. The stellar populations with such anomalous variations in G ... 14:00 - 15:00 Combinatorics and Computing Weekly Seminar Visibility Concepts in Graph Theory School MATHEMATICS Recently, the field of computer science has seen a need to explore the concept of visibility in graph theory. The variety of related concepts can be described as follows. Given a connected graph $G$ and a set of vertices $Xsubseteq V(G)$, two vertices $x,y in V(G)$ are called to be $X$-visible if there is a shortest $x,y$-path (also called geodesic) whose interior vertices do not belong to $X$. With this idea in mind, we say that $X$ is a mutual-visibility set: if any two vertices of $X$ are $X$-visible; an outer mutual-visibility set: if any two vertices $x,y in X$ and any two vertices $x in X$ and $y in overline{X}$ ar ... 14:00 - 15:00 Weekly Seminar Quantum-Inspired Tensor Networks for Machine Learning School NANO SCIENCES In this talk, I will give an overview of tensor network (TN) methods, which are efficient numerical approaches for the simulation of quantum many-body problems, and their application in machine learning (ML). In particular, I Will discuss how ideas inspired by quantum physics can be leveraged to do machine learning and improve deep learning methods. I will further showcase how tensor networks can be integrated with ML models for kernel learning and fully connected neural networks to do data classification and regression. Click the link to join this webinar Read more 15:30 - 17:00 Geometry and Topology Weekly Seminar Calabi Flow on Riemann surfaces School MATHEMATICS Long time existence of Calabi flow on Riemann surfaces was first proved by Chrusciel and later by Chen. In this talk, We give a different proof for the long time existence. Venue: Niavaran, Lecture Hall 1 ... 17:30 - 19:00 Algebraic Geometry Biweekly Webinar Generating Sequences of Valuations School MATHEMATICS Suppose that $(K,v_0)$ is a valued field, $f(x)in K[x]$ is a monic and irreducible polynomial and $(L,v)$ is an extension of valued fields, where $L=K[x]/(f(x))$. Let $A$ be a local domain with quotient field $K$ dominated by the valuation ring of $v_0$ and such that $f(x)$ is in $A[x]$. The study of these extensions is a classical subject. In this talk, we discuss the history of this subject, connections with resolution of singularities, and recent progress. We will discuss our recent work with Razieh Ahmadian on the problem of describing the structure of the associated graded ring ${ m gr}_v A[x]/(f(x))$ of $A[x]/(f(x))$ for the filtration ... |