Publications

Fast Best Subset Selection: Coordinate Descent and Local Combinatorial Optimization Algorithms. Link. Code.
    Hussein Hazimeh and Rahul Mazumder. Operations Research (2020).
    Young Researchers Prize (for an Outstanding Paper in Optimization), INFORMS Optimization Society.

Learning Sparse Classifiers: Continuous and Mixed Integer Optimization Perspectives. Link. Code.
    Antoine Dedieu, Hussein Hazimeh, and Rahul Mazumder. JMLR (2021, to appear)

The Tree Ensemble Layer: Differentiability meets Conditional Computation. Link. Code.
    Hussein Hazimeh, Natalia Ponomareva, Petros Mol, Zhenyu Tan, and Rahul Mazumder. ICML (2020).

Learning Hierarchical Interactions at Scale: A Convex Optimization Approach. Link. Code.
    Hussein Hazimeh and Rahul Mazumder. AISTATS (2020).

Axiomatic Analysis of Smoothing Methods in Language Models for Pseudo-Relevance Feedback. Link.
    Hussein Hazimeh and ChengXiang Zhai. SIGIR ICTIR (2015).

Preprints

Sparse Regression at Scale: Branch-and-Bound rooted in First-Order Optimization. Link. Code.
    Hussein Hazimeh, Rahul Mazumder, and Ali Saab. Under review in Mathematical Programming.
    Best Student Paper Award, MIT ORC.
    Honorable Mention, INFORMS Computing Society.

Grouped Variable Selection using Discrete Optimization. Link.
    Hussein Hazimeh, Rahul Mazumder, and Peter Radchenko.

In Progress

Sparse Regression with Hierarchical Interactions: A Scalable Integer Programming Approach
    Hussein Hazimeh and Rahul Mazumder.
    Honorable Mention, Mixed Integer Programming Workshop (2019).