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Wednesday, September 29, 2021

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.

Wednesday, September 29, 2021

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

Wednesday, October 6, 2021

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

Wednesday, October 6, 2021

Posted September 21, 2021

Harmonic Analysis Seminar

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.

Wednesday, October 6, 2021

Posted September 20, 2021

Geometry and Topology Seminar Seminar website

3:30 pm

Christin Bibby, Louisiana State University

Monday, October 11, 2021

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

Wednesday, October 13, 2021

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

Wednesday, October 13, 2021

Posted September 7, 2021

Geometry and Topology Seminar Seminar website

3:30 pm Lockett 233

Matt Clay, University of Arkansas

Wednesday, October 20, 2021

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

Friday, October 22, 2021

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

Wednesday, October 27, 2021

Posted September 20, 2021

Geometry and Topology Seminar Seminar website

3:30 pm

Orsola Capovilla-Searle, University of California, Davis

Wednesday, November 3, 2021

Posted September 9, 2021

Geometry and Topology Seminar Seminar website

3:30 pm Lockett 233

Yvon Verberne, Georgia Tech

Friday, November 5, 2021

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.

Monday, November 8, 2021

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

Wednesday, November 10, 2021

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

Wednesday, November 10, 2021

Posted September 18, 2021

Geometry and Topology Seminar Seminar website

3:30 pm

Assaf Bar-Natan, University of Toronto

Friday, November 12, 2021

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

Monday, November 15, 2021

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

Wednesday, November 17, 2021

Posted September 9, 2021

Geometry and Topology Seminar Seminar website

3:30 pm Lockett 233

Daniel Platt, Imperial College London

Friday, November 19, 2021

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

Friday, December 3, 2021

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.