last updated: 02/15/2023
I am a Member of Research Staff at Voleon.
I obtained my PhD in Computer Science at UW-Madison working with Jeff Linderoth, Jim Luedtke, and Steve Wright.
Then spent some time as a postdoc at Wisconsin Institute for Discovery, Georgia Tech ISyE, and Uber ATG.
My academic research is in the field of Mathematical Optimization.
I developed algorithms for machine learning and operations research, generally with the goal of making hard problems more tractable.
Some topics I’ve tackled include robustness verification, structured regression, parallel optimization, and mixed-integer nonconvex optimization.
Papers
Hierarchical Verification for Robustness Verification
Cong Han Lim, Raquel Urtasun, Ersin Yumer
ICML 2020
Subgradient Sampling Methods for the Lagrangian Dual in Stochastic Mixed-Integer Programming
Cong Han Lim, Jeffrey Linderoth, James Luedtke, Stephen Wright
INFORMS Journal on Optimization (2020)
An Efficient Pruning Algorithm for Robust Isotonic Regression
Cong Han Lim
NeurIPS 2018
A Distributed Quasi-Newton Algorithm for Primal and Dual Regularized Empirical Risk Minimization
Ching-Pei Lee, Cong Han Lim, Stephen Wright
ArXiv (2019) / KDD 2018 (shorter version)
A Note on Extended Formulations for Cardinality-based Sparsity
Cong Han Lim
NeurIPS Optimization for Machine Learning Workshop 2017
k-Support and Ordered Weighted Sparsity for Overlapping Groups - Hardness and Algorithms
Cong Han Lim, Stephen Wright
NeurIPS 2017
Valid Inequalities for Separable Concave Constraints with Indicator Variables
Cong Han Lim, Jeff Linderoth, James Luedtke
Mathematical Programming (2017) / IPCO 2016
A Box-Constrained Approach for Hard Permutation Problems
Cong Han Lim, Stephen Wright
ICML 2016
Efficient Bregman Projections onto the Permutahedron and Related Polytopes
Cong Han Lim, Stephen Wright
AISTATS 2016
Sorting Network Relaxations for Vector Permutation Problems
Cong Han Lim, Stephen Wright
NeurIPS 2014
Validating Sample Average Approximation Solutions with Negatively Dependent Batches
Jiajie Chen, Cong Han Lim, Peter Qian, Jeffrey Linderoth, Stephen Wright
ArXiV (2014)
Other Stuff
A good chunk of my free time geeking out over films.
In Chicago, check out Doc Films, Facets
Cinematheque, Gene Siskel Film Center, and Music Box Theatre.
In Madison, the UW Cinematheque has impeccable programming. Madison is also home to film theorists David Bordwell and Kristin Thompson, who have one of my favorite film blogs.
In Los Angeles, check out everything. The Academy Museum is not a bad place to start.
If you want streaming sites that offer something a little different, try Mubi or The Criterion Channel.
last movie watched: The Birds
I am from Singapore. We have great food there.