Posted September 6, 2021
Last modified September 14, 2021
Geometry and Topology Seminar Seminar website
9:30 am Lockett 233
Michael Farber, Queen Mary University of London
Ample simplicial complexes
I will first describe a remarkable simplicial complex X which can be uniquely characterised by its universality and homogeneity. It contains an isomorphic copy of any simplicial complex with countably many vertexes as an induced subcomplex. A random simplicial complex on countably many vertexes is isomorphic to X with probability 1. The main focus of the talk will be on r-ample simplicial complexes which are finite approximations to X and possess many striking properties. The r-ample complexes can potentially be used for designing stable and resilient networks. The talk is based on joint work with C. Even-Zohar, L. Mead and L. Strauss.
Posted September 8, 2021
Informal Geometry and Topology Seminar Questions or comments?
1:30 pm - 3:00 pm Lockett 233
Nilangshu Bhattacharyya, Louisiana State University
TBD
Posted September 9, 2021
Informal Geometry and Topology Seminar Questions or comments?
1:30 pm - 3:00 pm Lockett 233
Justin Murray, Louisiana State University
TBD
Posted September 21, 2021
3:30 pm - 4:30 pm TBA
Franz Luef, Norwegian University of Science and Technology
Wiener’s Tauberian Theorem in Quantum Harmonic Analysis
Abstract: We present variants of Wiener’s Tauberian Theorems for operators as well as of the Wiener-Pitt theorem, which are based on operator convolutions introduced by R.F. Werner in his seminal work on quantum harmonic analysis on phase space. These results have applications in time-frequency analysis and for quantization schemes. This talk is based on joint work with Eirik Skrettingland.
Posted September 20, 2021
Geometry and Topology Seminar Seminar website
3:30 pm
Christin Bibby, Louisiana State University
Posted August 23, 2021
Applied Analysis Seminar Questions or comments?
3:30 pm - 4:30 pm Zoom
Jun-cheng Wei, University of British Columbia
Canada Research Chair (CRC Tier I) in Nonlinear Partial Differential Equations
TBA
Posted September 8, 2021
Last modified September 21, 2021
Informal Geometry and Topology Seminar Questions or comments?
1:30 pm - 3:00 pm Lockett 233
Amit Kumar, Louisiana State University
TBD
Posted September 7, 2021
Geometry and Topology Seminar Seminar website
3:30 pm Lockett 233
Matt Clay, University of Arkansas
Posted September 8, 2021
Geometry and Topology Seminar Seminar website
3:30 pm
Nikita Nikolaev, University of Sheffield
Abelianisation of Filtered Local Systems on Surfaces
Posted September 21, 2021
Control and Optimization Seminar Questions or comments?
9:30 am - 10:20 am https://lsu.zoom.us/j/94269991036 (Click "Questions or comments?" to request password)
Ilya Kolmanovsky, University of Michigan
IEEE Fellow, AACC Eckman Awardee
TBA
Posted September 20, 2021
Geometry and Topology Seminar Seminar website
3:30 pm
Orsola Capovilla-Searle, University of California, Davis
Posted September 9, 2021
Geometry and Topology Seminar Seminar website
3:30 pm Lockett 233
Yvon Verberne, Georgia Tech
Posted August 25, 2021
Last modified September 17, 2021
Control and Optimization Seminar Questions or comments?
9:30 am - 10:20 am https://lsu.zoom.us/j/94269991036 (Click "Questions or comments?" to request password)
Kyriakos Vamvoudakis, Georgia Institute of Technology
Learning-Based Actuator Placement and Receding Horizon Control for Security against Actuation Attacks
Cyber-physical systems (CPS) comprise interacting digital, analog, physical, and human components engineered for function through integrated physics and logic. Incorporating intelligence in CPS, however, makes their physical components more exposed to adversaries that can potentially cause failure or malfunction through actuation attacks. As a result, augmenting CPS with resilient control and design methods is of grave significance, especially if an actuation attack is stealthy. Towards this end, in the first part of the talk, I will present a receding horizon controller, which can deal with undetectable actuation attacks by solving a game in a moving horizon fashion. In fact, this controller can guarantee stability of the equilibrium point of the CPS, even if the attackers have an information advantage. The case where the attackers are not aware of the decision-making mechanism of one another is also considered, by exploiting the theory of bounded rationality. In the second part of the talk, and for CPS that have partially unknown dynamics, I will present an online actuator placement algorithm, which chooses the actuators of the CPS that maximize an attack security metric. It can be proved that the maximizing set of actuators is found in finite time, despite the CPS having uncertain dynamics. Biography of the speaker.
Posted September 5, 2021
Last modified September 22, 2021
Applied Analysis Seminar Questions or comments?
3:30 pm - 4:30 pm Zoom
Christopher Henderson, University of Arizona
TBA
Posted September 9, 2021
Informal Geometry and Topology Seminar Questions or comments?
1:30 pm - 3:00 pm Lockett 233
Jackson Knox, Louisiana State University
TBD
Posted September 18, 2021
Geometry and Topology Seminar Seminar website
3:30 pm
Assaf Bar-Natan, University of Toronto
Posted August 18, 2021
Control and Optimization Seminar Questions or comments?
9:30 am - 10:20 am https://lsu.zoom.us/j/94269991036 (Click "Questions or comments?" to request password)
Kirsten Morris, University of Waterloo
IEEE Fellow, SIAM Fellow
TBA
Posted September 22, 2021
Applied Analysis Seminar Questions or comments?
9:30 am - 10:30 am Zoom
Thomas Alazard, Ecole Normale Superieure Paris-Saclay, CNRS
TBA
Posted September 9, 2021
Geometry and Topology Seminar Seminar website
3:30 pm Lockett 233
Daniel Platt, Imperial College London
Posted September 20, 2021
Control and Optimization Seminar Questions or comments?
9:30 am - 10:20 am https://lsu.zoom.us/j/94269991036 (Click "Questions or comments?" to request password)
Sonia Martinez, University of California, San Diego
IEEE Fellow
TBA
Posted September 8, 2021
Last modified September 13, 2021
Control and Optimization Seminar Questions or comments?
9:30 am - 10:20 am https://lsu.zoom.us/j/94269991036 (Click "Questions or comments?" to request password)
Jorge Cortes, University of California, San Diego
IEEE Fellow, SIAM Fellow
Resource-Aware Control and Coordination of Cyberphysical Systems
Trading computation and decision making for less communication, sensing, or actuator effort offers great promise for the autonomous operation of both individual and interconnected cyberphysical systems. Resource-aware control seeks to prescribe, in a principled way, when to use the available resources efficiently while still guaranteeing a desired quality of service in performing the intended task. This talk describes advances of this paradigm along three interconnected thrusts: the design of triggering criteria that balance the trade-offs among performance, efficiency, and implementability; the synthesis of distributed triggers in network systems that can be evaluated by individual agents; and the benefits of flexibly interpreting what constitutes a resource. Throughout the presentation, we illustrate our discussion with applications to stabilization under information constraints, opportunistic actuation of safety-critical systems, and information exchanges in the coordination of multi-agent systems.