3 papers
cs.LG2026
A Federated Generalized Expectation-Maximization Algorithm for Mixture Models with an Unknown Number of Components
Michael Ibrahim, Nagi Gebraeel, Weijun Xie
We study the problem of federated clustering when the total number of clusters across clients is unknown, and the clients have heterogeneous but potentially overlapping cluster…
math.OC2024
On the ReLU Lagrangian Cuts for Stochastic Mixed Integer Programming
Haoyun Deng, Weijun Xie
We study stochastic mixed integer programs with both first-stage and recourse decisions involving mixed integer variables. A new family of Lagrangian cuts, termed ``ReLU Lagrangian…
math.OC2024
The Blessing of Strategic Customers in Personalized Pricing
Zhi Chen, Bradley Sturt, Weijun Xie
We consider a feature-based personalized pricing problem in which the buyer is strategic: given the seller's pricing policy, the buyer can augment the features that they reveal to…