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math.OC2026
Convex and Non-convex Federated Learning with Stale Stochastic Gradients: Diminishing Step Size is All You Need
Xinran Zheng, Tara Javidi, Behrouz Touri
We propose a general framework for distributed stochastic optimization under delayed gradient models. In this setting, local agents leverage their own data and computation to a…
math.OC2025
Multi-Agent Fact Checking
Ashwin Verma, Soheil Mohajer, Behrouz Touri
We formulate the problem of fake news detection using distributed fact-checkers (agents) with unknown reliability. The stream of news/statements is modeled as an independent and id…
math.OC2024
A Perron-Frobenius Theorem for Strongly Aperiodic Stochastic Chains
Rohit Parasnis, Massimo Franceschetti, Behrouz Touri
We derive a generalization of the Perron-Frobenius theorem to time-varying row-stochastic matrices as follows: using Kolmogorov's concept of absolute probability sequences, which a…