| Friday 17 January 2025 | |
| Events for day: Wednesday 15 November 2023 |
IPM School on High Energy Physics PHYSICS Date: 15-17 November 2023 ... 12:15 - 13:45 Geometry and Differential Equations Seminar Quantum Metrics and Curvature School MATHEMATICS Following Riemann's Habilitations talk, we introduce a new geometric structure over a Kahler manifold called quantum metric and also introduce its associated quantum curvature. Following Einstein's program of general relativity in the resolution of Newton's gravity in the Riemann's curvature of spacetime, we initiate a program for the resolution of quantum theory in the quantum curvature of phase space. This program opens a window towards the resolution of the main open problem of mathematical physics, namely, quantum gravity. Venue: Niavaran, Lecture Hall 1 ... 13:30 - 15:00 Weekly Seminar Multi-messenger signatures of the gamma-ray burst central engine School ASTRONOMY Gamma-ray bursts (GRBs) are among the most explosive and brightest transient phenomena in the Universe, occurring at cosmological distances. GRBs exhibit a prompt phase lasting from a few seconds to several minutes, followed by an afterglow phase across the entire electromagnetic (EM) spectrum. In addition to EM counterpart, short GRBs are associated with gravitational waves (GWs) due to binary mergers involving black holes (BHs) and/or neutron stars (NSs), marking the advent of the multi-messenger era in the study of these sources. After decades of investigation, the origin of the jet composition, the radiation, and energy dissipation mecha ... 14:00 - 15:00 Combinatorics and Computing Weekly Seminar On the Restricted Size Ramsey Number for a Pair of Cycles School MATHEMATICS I will talk about a new version of Ramsey number, we call it the restricted size Ramsey number. Although this notion has been around for quite some time, there are rather few results on the restricted Ramsey number in the literature. In a joint work with Tomasz Łuczak and Joanna Polcyn, we determine the exact value of the restricted size Ramsey number of two cycles, where one of them is large enaugh and the other one is odd. Finally we point to an interesting result on the Ramsey number of two cycles in random graphs. https://us06web.zoom.us/j/83407340293?pwd=cXarB4geUkQrP9MMwe8Z71K94wYPpT.1 Meeti ... 14:00 - 15:00 Weekly Seminar Optical Tweezers: Harnessing Light for Manipulation and Exploration of the Microscopic World School NANO SCIENCES Until a few decades ago, the manipulation of biological cells and conducting physical investigations at microscopic scales using light seemed like an unattainable notion. However, following the invention of lasers, Arthur Ashkin successfully revolutionized the field by successfully utilizing light to manipulate and trap tiny particles, giving birth to optical tweezers. By precisely focusing a laser beam, optical tweezers enable the trapping of particles through the transfer of light's momentum. Today, optical tweezers equipped with exceptional capabilities to measure pico- and femto-newton forces have become an immensely powerful tool for stu ... 15:30 - 17:00 Geometry and Topology Weekly Seminar Nondegeneracy of the Spectrum of the Twisted Cocycle for IETs School MATHEMATICS An interval exchange transformation (IET) is a map from the unit interval to itself for which the interval admits a finite partition by subintervals over each of which, the map acts as translation in such a way that the image of the interior of the intervals is disjoint from one another. This family of maps arise naturally as the return maps of directional flows on translation surfaces. The ergodic theory of IETs has been studied extensively by many authors. In this talk, we will review some ergodic properties of this family. Then, we introduce linear cocycles over the space of IETs and study their spectral properties. A well-known cocycle is ... 17:30 - 19:00 Algebraic Geometry Biweekly Webinar Equivariant Geometry of Singular Cubic Threefolds School MATHEMATICS I will report on a joint work with Yuri Tschinkel (Simons Foundation) and Zhijia Zhang (New York University) on linearizability of actions of finite groups on singular cubic threefolds. https://zoom.us/join Meeting ID: 9086116889 Passcode: 362880 Email: agnt@ipm.ir Venue: , (Online) ... |