Search Results for author: Tamer Basar

Found 21 papers, 1 papers with code

Disentangling Resilience from Robustness: Contextual Dualism, Interactionism, and Game-Theoretic Paradigms

no code implementations10 Mar 2024 Quanyan Zhu, Tamer Basar

The article concludes by discussing the interplay between robustness and resilience, suggesting that a comprehensive theory of resilience and quantification metrics, and formalization through game-theoretic frameworks are necessary.

Learning Theory

A Discrete-time Networked Competitive Bivirus SIS Model

no code implementations20 Oct 2023 Sebin Gracy, Ji Liu, Tamer Basar, Cesar A. Uribe

We identify a sufficient condition for exponential convergence to the disease-free equilibrium (DFE).

Analysis, Control, and State Estimation for the Networked Competitive Multi-Virus SIR Model

no code implementations15 May 2023 Ciyuan Zhang, Sebin Gracy, Tamer Basar, Philip E. Pare

Second, we propose an observation model which captures the summation of all the viruses' infection levels in each node, which represents the individuals who are infected by different viruses but share similar symptoms.

Decentralized Nonconvex Optimization with Guaranteed Privacy and Accuracy

no code implementations14 Dec 2022 Yongqiang Wang, Tamer Basar

The new algorithm allows the incorporation of persistent additive noise to enable rigorous differential privacy for data samples, gradients, and intermediate optimization variables without losing provable convergence, and thus circumventing the dilemma of trading accuracy for privacy in differential privacy design.

Quantization enabled Privacy Protection in Decentralized Stochastic Optimization

no code implementations7 Aug 2022 Yongqiang Wang, Tamer Basar

In combination with the presented quantization scheme, the proposed algorithm ensures, for the first time, rigorous differential privacy in decentralized stochastic optimization without losing provable convergence accuracy.

Quantization Stochastic Optimization

A Networked Competitive Multi-Virus SIR Model: Analysis and Observability

no code implementations1 Apr 2022 Ciyuan Zhang, Sebin Gracy, Tamer Basar, Philip E. Pare

This paper proposes a novel discrete-time multi-virus SIR (susceptible-infected-recovered) model that captures the spread of competing SIR epidemics over a population network.

Decentralized Multi-Task Stochastic Optimization With Compressed Communications

no code implementations23 Dec 2021 Navjot Singh, Xuanyu Cao, Suhas Diggavi, Tamer Basar

The paper develops algorithms and obtains performance bounds for two different models of local information availability at the nodes: (i) sample feedback, where each node has direct access to samples of the local random variable to evaluate its local cost, and (ii) bandit feedback, where samples of the random variables are not available, but only the values of the local cost functions at two random points close to the decision are available to each node.

Stochastic Optimization

Decentralized Cooperative Multi-Agent Reinforcement Learning with Exploration

no code implementations29 Sep 2021 Weichao Mao, Tamer Basar, Lin Yang, Kaiqing Zhang

Many real-world applications of multi-agent reinforcement learning (RL), such as multi-robot navigation and decentralized control of cyber-physical systems, involve the cooperation of agents as a team with aligned objectives.

Multi-agent Reinforcement Learning Q-Learning +3

Decentralized Q-Learning in Zero-sum Markov Games

no code implementations NeurIPS 2021 Muhammed O. Sayin, Kaiqing Zhang, David S. Leslie, Tamer Basar, Asuman Ozdaglar

The key challenge in this decentralized setting is the non-stationarity of the environment from an agent's perspective, since both her own payoffs and the system evolution depend on the actions of other agents, and each agent adapts her policies simultaneously and independently.

Multi-agent Reinforcement Learning Q-Learning

The Confluence of Networks, Games and Learning

no code implementations17 May 2021 Tao Li, Guanze Peng, Quanyan Zhu, Tamer Basar

In addition to existing research works on game-theoretic learning over networks, we highlight several new angles and research endeavors on learning in games that are related to recent developments in artificial intelligence.

Decision Making Management

Fixed-Time Nash Equilibrium Seeking in Non-Cooperative Games

no code implementations23 Dec 2020 Jorge I. Poveda, Miroslav Krstic, Tamer Basar

We introduce a novel class of Nash equilibrium seeking dynamics for non-cooperative games with a finite number of players, where the convergence to the Nash equilibrium is bounded by a KL function with a settling time that can be upper bounded by a positive constant that is independent of the initial conditions of the players, and which can be prescribed a priori by the system designer.

Optimization and Control

On the Stability and Convergence of Robust Adversarial Reinforcement Learning: A Case Study on Linear Quadratic Systems

no code implementations NeurIPS 2020 Kaiqing Zhang, Bin Hu, Tamer Basar

We find: i) the conventional RARL framework (Pinto et al., 2017) can learn a destabilizing policy if the initial policy does not enjoy the robust stability property against the adversary; and ii) with robustly stabilizing initializations, our proposed double-loop RARL algorithm provably converges to the global optimal cost while maintaining robust stability on-the-fly.

Continuous Control Reinforcement Learning (RL)

Natural Policy Gradient Primal-Dual Method for Constrained Markov Decision Processes

no code implementations NeurIPS 2020 Dongsheng Ding, Kaiqing Zhang, Tamer Basar, Mihailo Jovanovic

To the best of our knowledge, our work is the first to establish non-asymptotic convergence guarantees of policy-based primal-dual methods for solving infinite-horizon discounted CMDPs.

Decision Making

Robust Multi-Agent Reinforcement Learning with Model Uncertainty

no code implementations NeurIPS 2020 Kaiqing Zhang, Tao Sun, Yunzhe Tao, Sahika Genc, Sunil Mallya, Tamer Basar

In contrast, we model the problem as a robust Markov game, where the goal of all agents is to find policies such that no agent has the incentive to deviate, i. e., reach some equilibrium point, which is also robust to the possible uncertainty of the MARL model.

Multi-agent Reinforcement Learning Q-Learning +2

Partially Observed Discrete-Time Risk-Sensitive Mean Field Games

no code implementations24 Mar 2020 Naci Saldi, Tamer Basar, Maxim Raginsky

In this paper, we consider discrete-time partially observed mean-field games with the risk-sensitive optimality criterion.

Bayesian Persuasion with State-Dependent Quadratic Cost Measures

no code implementations22 Jul 2019 Muhammed O. Sayin, Tamer Basar

We also quantify the approximation error for a quantized version of a continuous distribution and show that a semi-definite program relaxation of the equivalent problem could be a benchmark lower bound for the sender's cost for large state spaces.

Computer Science and Game Theory Optimization and Control

A Multi-Agent Off-Policy Actor-Critic Algorithm for Distributed Reinforcement Learning

1 code implementation15 Mar 2019 Wesley Suttle, Zhuoran Yang, Kaiqing Zhang, Zhaoran Wang, Tamer Basar, Ji Liu

This paper extends off-policy reinforcement learning to the multi-agent case in which a set of networked agents communicating with their neighbors according to a time-varying graph collaboratively evaluates and improves a target policy while following a distinct behavior policy.

reinforcement-learning Reinforcement Learning (RL)

Reliable Smart Road Signs

no code implementations30 Jan 2019 Muhammed O. Sayin, Chung-Wei Lin, Eunsuk Kang, Shinichi Shiraishi, Tamer Basar

Recently, vision-based road sign classification algorithms have been shown to be vulnerable against (even) small scale adversarial interventions that are imperceptible for humans.

Classification General Classification

Adaptive-Rate Compressive Sensing Using Side Information

no code implementations3 Jan 2014 Garrett Warnell, Sourabh Bhattacharya, Rama Chellappa, Tamer Basar

We provide two novel adaptive-rate compressive sensing (CS) strategies for sparse, time-varying signals using side information.

Compressive Sensing

Cannot find the paper you are looking for? You can Submit a new open access paper.