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Michael Ibrahim

3 accepted papers

2026

A Federated Generalized Expectation-Maximization Algorithm for Mixture Models with an Unknown Number of Components

ICLR 2026poster

We study the problem of federated clustering when the total number of clusters $K$ across clients is unknown, and the clients have heterogeneous but potentially overlapping cluster sets in their local data. To that end, we develop FedGEM: a federated generalized expectation-maximization algorithm fo…

Cited by 0SourceScholar
2026

A Hitchhiker's Guide to Poisson Gradient Estimation

ICML 2026poster

Poisson-distributed latent variable models are widely used in computational neuroscience, but differentiating through discrete stochastic samples remains challenging. Two approaches address this: *Exponential Arrival Time* (EAT) simulation and *Gumbel-SoftMax* (GSM) relaxation. We provide the first …

Cited by 0SourceScholar
2025

FDR-SVM: A Federated Distributionally Robust Support Vector Machine via a Mixture of Wasserstein Balls Ambiguity Set

UAI 2025

We study a federated classification problem over a network of multiple clients and a central server, in which each client’s local data remains private and is subject to uncertainty in both the features and labels. To address these uncertainties, we develop a novel Federated Distributionally Robust S

Cited by 0SourcePDFScholar