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Bartolomeo Stellato

I am an Assistant Professor at the Department of Operations Research and Financial Engineering at Princeton University. I am an associated faculty with the Department of Electrical and Computer Engineering, the Department of Computer Science, the Center for Statistics and Machine Learning, and the Robotics at Princeton initiative. I am also a fellow at Princeton Whitman college.

My research lies at the interface of mathematical optimization, machine learning, and optimal control. It focuses on data-driven computational tools to make decisions in highly dynamic and uncertain environments.

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News

Sep 2024
I just had a great visit to Johns Hopkins University. I gave a talk at the MINDS / CIS Seminar Series entitled Data-Driven Algorithm Design and Verification for Parametric Convex Optimization. Thanks a lot Nicolas Loizou for the invitation.
So proud of my first graduate student Rajiv Sambharya for successfully defending his thesis entitled Learning to Accelerate Optimization Algorithms with Guarantees ๐ŸŽ‰ Rajiv will soon start a postdoc at UPenn Engineering.
Excited to welcome Jisun Park as a postdoc in our research group!
Jul 2024
It was great to organize Princeton Workshop on Optimization, Learning, and Control last June! Thanks to everyone who attended and made it a success! Missed the live sessions? Catch up on all the talks with the video recordings ๐Ÿ“น here.
Our work on the OSQP solver has received the prestigious Beale โ€” Orchard-Hays Prize for Excellence in Computational Mathematical Programming! ๐ŸŽ‰ Here is a ๐Ÿงต on X
๐Ÿ”ˆ Excited to be interviewed by Ashley Kilgore with my previous senior thesis student, Joyce Luo, now at MIT, on the INFORMS Resoundingly Human podcast! ๐ŸŽ™๏ธ. We discussed our paper Equitable Data-Driven Facility Location and Resource Allocation to Fight the Opioid Epidemic that just appeared on Manufacturing & Service Operations Management. Tune in to discover how data and optimization combat the opioid epidemic ๐ŸŒŽ ๐Ÿ’Š
Jun 2024
Missed the chance to register for the Princeton Workshop on Optimization, Learning, and Control? Don't worry, you can still join us! ๐ŸŽ‰ We'll be live streaming the event on June 27-28, 2024. Tune in here ๐Ÿ“ป stellato.io/olc/live
Our paper Learning to Warm-Start Fixed-Point Optimization Algorithms has been accepted in the Journal of Machine Learning Research! Joint work with Georgina Hall, Brandon Amos, and led by my student Rajiv Sambharya. See Rajiv's ๐Ÿงต on X!
May 2024
It was great to give a talk at the Robust Optimization Webinar on Learning for Decision-Making under Uncertainty. Check out the video ๐Ÿ“น here! Thanks a lot Jannis Kurtz and Ahmadreza Marandi for the invitation.
It was great to give a talk on Learning for Real-Time Decision Making at the Department of Mathematics of the University of Pavia. Thanks Stefano Gualandi for the kind invitation!
Honored to receive the Howard B. Wentz, Jr. Junior Faculty Award from the Princeton School of Engineering and Applied Science (SEAS)!
It was great to be back at the MIT ORC to give a talk on Learning for Real-Time Decision Making.
Haimin Hu and Zixu Zhang won the Outstanding Presentation Award at the Princeton Research Day for presenting our work Who Plays First? Optimizing the Order of Play in Stackelberg Games with Many Robots. That's work with Gabriele Dragotto Jaime Fernandez Fisac. Check out the ๐ŸŽฅ here!
๐Ÿ“ฃ Registrations open for the Princeton Workshop on Optimization, Learning, and Control (OLC)! Sign up ๐Ÿ“ by June 1 to attend!
Apr 2024
Our paper Exterior-point Optimization for Sparse and Low-rank Optimization has been accepted in the Journal of Optimization Theory and Applications. That's in collaboration with Shuvomoy Das Gupta and Bart Van Parys.
I gave an Autonomy Talk on Learning for Decision-Making under Uncertainty. Thanks Gioele Zardini for the invitation!
Our paper Equitable Data-Driven Facility Location and Resource Allocation to Fight the Opioid Epidemic has been accepted in Manufacturing & Service Operations Management. That's in collaboration with my senior thesis student Joyce Luo (now at MIT ORC).
Proud of my student Irina Wang for receiving the Wallace Memorial Fellowship in Engineering!
Mar 2024
Great to attend the INFORMS Optimization Society Conference. I served as the cluster chair on Emerging Applications of Optimization together with Holly Wiberg. We organized 14 sessions! I also co-chaired two sessions with my students Irina Wang and Rajiv Sambharya.
Received a Seed Grant from the Princeton School of Engineering and Applied Sciences entitled Unsupervised Conditional Generative Machine Learning for Global Nonlinear Optimal Control: Applications in Spaceflight, in collaboration with Ryne Beeson and Adji Bousso Dieng.
I gave a talk on Learning Decision-Focused Uncertainty Sets for Robust Optimization at the Conference on Information Sciences and Systems at Princeton University. I also organized a session where my students Rajiv Sambharya and Vinit Ranjan, and Jan Drgona and Mahyar Fazlyab gave talks.
The poster submission deadline for the Princeton Workshop on Optimization, Learning, and Control (OLC) has been extended to March 10!
Feb 2024
It was great to attend the AAAI Workshop on Learnable Optimization. I gave a talk on Learning Decision-Focused Uncertainty Sets for Robust Optimization. Thanks Jรกn Drgoลˆa for the kind invitation!
Jan 2024
Join us for the Princeton Workshop on Optimization, Learning, and Control (OLC) on June 27-28 2024! We have a great lineup of speakers and a poster session for junior researchers.
I have been granted associated faculty status at the Princeton Department of Computer Science.
Dec 2023
It was great to attend the IEEE Conference on Decision and Control in Singapore. My student Stefan Clarke gave a talk on Learning Rationality in Potential Games.
Nov 2023
Proud of my student Irina Wang for winning the Princeton SEAS Award for Excellence!
I will be the Vice-Chair of Computational Optimization and Software of the INFORMS Optimization Society until 2025. Excited to work on boosting visibility of computational optimization in and beyond INFORMS!
New preprint Differentiable Cutting-plane Layers for Mixed-integer Linear Optimization led by Gabriele Dragotto and Stefan Clarke, and in collaboration with Jaime Fernandez Fisac! See thread on X! Differentiable optimization ๐Ÿค cutting plane algorithms!
Oct 2023
I have organized one invited session at the INFORMS Annual Meeting where Irina Wang, Rajiv Sambharya, Vinit Ranjan, and I gave a talk. Also, Stefan Clarke and Gabriele Dragotto gave a talk in a separate session.
New preprint GeNIOS: an (almost) second-order operator-splitting solver for large-scale convex optimization led by Theo Diamandis and in collaboration with with Zach Frangella, Shipu Zhao, and Madeleine Udell. Check out the Julia code!
Sep 2023
New preprint Learning to Warm-Start Fixed-Point Optimization Algorithms! We introduce a new learning framework to warm-start fixed-point optimizers, with great computation savings and generalization guarantees. Check out the code! Joint work with collaborators Georgina Hall, Brandon Amos, and led by my student Rajiv Sambharya.
It was great to attend the visit the Zuse Institute Berlin for the final Conference on the Thematic Einstein Semester. I gave a talk on Mean Robust Optimization.
Aug 2023
Gabriele Dragotto won the DataX Postdoctoral Research Fellowship from Princeton CSML!
Jul 2023
It was great to attend the International Conference on Stochastic Programming in UC Davis. Irina Wang gave a talk on Mean Robust Optimization and I gave one on Learning for Robust Optimization.
Amit Solomon just joined our group as a Research Software Engineer (RSE)! He will help us build great software packages to disseminate our work on numerical optimization. Amit is part of a new initiative by Princeton Research Computing to greatly expand the number of RSEs.
Our work Learning Rationality in Potential Games has been accepted to IEEE CDC 2023! It is led by my student Stefan Clarke in collaboration with Gabriele Dragotto and Jaime Fernandez Fisac. See you all in Singapore!
Jun 2023
It was great to attend L4DC! My student Rajiv Sambharya presented a poster on End-to-End Learning to Warm-Start for Real-Time Quadratic Optimization.
I have organized two minisymposia on Data-Driven Decision-Making Under Uncertainty at SIAM Conference on Optimization together with Dick den Hertog and Bart Van Parys. My student Irina Wang gave a talk on Mean Robust Optimization and I presented our work Learning for Robust Optimization.
May 2023
I gave a talk on Learning for Optimization under Uncertainty at the Mixed-Integer Programming Workshop at the University of Southern California. I really enjoyed it! Thanks to the brilliant organizers for the invitation!
Apr 2023
Mar 2023
I gave a talk on Learning for Optimization under Uncertainty at the Conference on Information Sciences and Systems at Johns Hopkins University. Thanks to Enrique Mallada and Mahyar Fazlyab for the invitation!
Thrilled to receive the NSF CAREER Award for the project entitled Learning for Real-Time Embedded Optimization!
New preprint Learning Rationality in Potential Games with my student Stefan Clarke, postdoc Gabriele Dragotto, and in collaboration with Jaime Fernandez Fisac.
Feb 2023
New preprint The Benefit of Uncertainty Coupling in Robust and Adaptive Robust Optimization in collaboration with Liangyuan Na and Dimitris Bertsimas.
New preprint On the (linear) convergence of Generalized Newton Inexact ADMM. Great collaboration with Zach Frangella, Shipu Zhao, Theo Diamandis, and Madeleine Udell.
Jan 2023
New preprint Equitable Data-Driven Resource Allocation to Fight the Opioid Epidemic: A Mixed-Integer Optimization Approach, in collaboration with my senior thesis student Joyce Luo (now at MIT ORC).
Dec 2022
Nov 2022
I have been granted associated faculty status at the Princeton Department of Electrical and Computer Engineering.
Oct 2022
I gave a talk on Mean Robust Optimization at the Future of Analytics and Operations Research workshop at the INFORMS Annual Meeting.
I have organized one invited session at the INFORMS Annual Meeting where Irina Wang, Rajiv Sambharya, and Vinit Ranjan gave a talk.
Sep 2022
Gabriele Dragotto joined our group at ORFE and Jaime Fernandez Fisac group at ECE as a postdoc to work on multi-agent networks.
Stefan Clarke (PhD) and Cole Becker (MSE) joined our group as graduate students.
Jul 2022
I have organized two invited sessions at ICCOPT where Irina Wang, Cole Becker, Rajiv Sambharya, and Vinit Ranjan gave a talk.
New preprint Mean Robust Optimization in collaboration with Bart Van Parys and my students Irina Wang and Cole Becker.
Vineet Bansal was featured on the CSML news for his brilliant work on OSQP!
Jun 2022
I gave a talk on Real-time decision-making via data-driven optimization at Politecnico di Milano at the DEIB Department Seminar. First time I was there after 10 years! Thanks Maria Prandini for the invitation!
Our proposal for an ORFE Research Software Engineer was selected for funding!
May 2022
Rajiv Sambharya won the Excellence in Teaching Award from the Princeton Graduate School for his work on ORF307!
Joyce Luo won the Sigma Xi Book Award (video at this link).
Mar 2022
I gave a talk on Real-time decision-making via data-driven optimization at the Cornell ORIE Seminar. Thanks Andrea Lodi for the invitation!
I gave a talk on Real-time decision-making via data-driven optimization at the NASA JPL Multi-Agent Tech Talks. Thanks Federico Rossi for the invitation!
Our paper Embedded Code Generation with CVXPY was accepted for publication in IEEE Control Systems Letters. It will be presented at IEEE CDC 2022.
Feb 2022
I received the Princeton SEAS Innovation Award for the proposal "Learning Task-specific Optimizers for Real-time Autonomous Systemsโ€!
Jaime and I won the Metropolis Project research award for the proposal โ€œTowards Resilient Urban Networks with Differentiable Agent Decision Modelsโ€!
Our paper Online mixed-integer optimization in milliseconds was accepted for publication in INFORMS Journal on Computing.
Jan 2022
I served in the program committee of the 4th L4DC conference.
Our paper CoCo: Online Mixed-Integer Control via Supervised Learning was accepted for publication in Robotics and Automation Letters!
Oct 2021
I became one of the project maintainers of CVXPY, which is part of NumFOCUS.
Sep 2021
Irina Wang and Vinit Ranjan joined our group as graduate students.
Jul 2021
I received internal funding from Princeton CSML to support Vineet Bansal, a Research Software Engineer, to work on OSQP.
May 2021
Mar 2021
Our paper Machine Learning for Real-Time Heart Disease Prediction was accepted for publication in IEEE Journal of Biomedical and Health Informatics.
Feb 2021
I started teaching the undergraduate optimization class ORF307.
Rajiv Sambharya joined our group as a graduate student.
Jan 2021
Our paper on the OSQP solver won the Best Paper Award for the journal Mathematical Programming Computation!
I served in the program committee of the 3rd L4DC conference.
I gave a talk on Real-time decision-making via data-driven optimization at the Raytheon Technologies Research Center. Thanks Alessandro Pinto for the invitation.
Nov 2020
I received the Pierskalla Best Paper Award from the INFORMS Health Applications Society together with the amazing folks of the COVIDAnalytics project!
Sep 2020
I started teaching the graduate optimization class ORF522.
I started organizing the Princeton Optimization Seminar.
Jul 2020
I joined the ORFE Department at Princeton University!