Jim Luedtke
@optimizer.bsky.social
Professor, Stochastic and Integer Optimizer, Dad
Reposted by Jim Luedtke
⚠️ WANTED: PhD student ⚠️
The topic? GPU-friendly algorithms for discrete optimization and mathematical programming, to be used inside decision-focused learning pipelines.
The mentors? My colleague Axel Parmentier and myself.
[1/3]
The topic? GPU-friendly algorithms for discrete optimization and mathematical programming, to be used inside decision-focused learning pipelines.
The mentors? My colleague Axel Parmentier and myself.
[1/3]
November 21, 2025 at 4:52 PM
⚠️ WANTED: PhD student ⚠️
The topic? GPU-friendly algorithms for discrete optimization and mathematical programming, to be used inside decision-focused learning pipelines.
The mentors? My colleague Axel Parmentier and myself.
[1/3]
The topic? GPU-friendly algorithms for discrete optimization and mathematical programming, to be used inside decision-focused learning pipelines.
The mentors? My colleague Axel Parmentier and myself.
[1/3]
Reposted by Jim Luedtke
Along with advancing optimization and game-theory research for post-disaster aid, Prof. Michini’s NSF CAREER Award supports new courses and researcher visits to help students learn the field: “I want to break that barrier…between professors and students..."🔗go.wisc.edu/zeuiau
@uwmadison.bsky.social
@uwmadison.bsky.social
Michini will use CAREER Award to improve post-disaster aid operations and more - College of Engineering - University of Wisconsin-Madison
While Carla Michini and her family took their usual summer trip to her native Italy in 2025, this was no relaxing getaway. Michini, an assistant professor of industrial and systems engineering at the University of...
go.wisc.edu
November 18, 2025 at 4:00 PM
Along with advancing optimization and game-theory research for post-disaster aid, Prof. Michini’s NSF CAREER Award supports new courses and researcher visits to help students learn the field: “I want to break that barrier…between professors and students..."🔗go.wisc.edu/zeuiau
@uwmadison.bsky.social
@uwmadison.bsky.social
Reposted by Jim Luedtke
Lately, I have been obsessed with developing theoretically based optimization algorithms that actually attain the best practical performance.
Alas, the classic model of minimax optimal methods is overly conservative; it overfits to tune its worst-case.
We found a path forward 1/
Alas, the classic model of minimax optimal methods is overly conservative; it overfits to tune its worst-case.
We found a path forward 1/
November 18, 2025 at 2:59 PM
Lately, I have been obsessed with developing theoretically based optimization algorithms that actually attain the best practical performance.
Alas, the classic model of minimax optimal methods is overly conservative; it overfits to tune its worst-case.
We found a path forward 1/
Alas, the classic model of minimax optimal methods is overly conservative; it overfits to tune its worst-case.
We found a path forward 1/
Reposted by Jim Luedtke
Alberto Del Pia
Projection-width: a unifying structural parameter for separable discrete optimization
https://arxiv.org/abs/2511.02990
Projection-width: a unifying structural parameter for separable discrete optimization
https://arxiv.org/abs/2511.02990
November 6, 2025 at 6:54 AM
Alberto Del Pia
Projection-width: a unifying structural parameter for separable discrete optimization
https://arxiv.org/abs/2511.02990
Projection-width: a unifying structural parameter for separable discrete optimization
https://arxiv.org/abs/2511.02990
Reposted by Jim Luedtke
October 29, 2025 at 4:29 AM
Reposted by Jim Luedtke
The simplex algorithm is super efficient. 80 years of experience says it runs in linear time. Nobody can explain _why_ it is so fast.
We invented a new algorithm analysis framework to find out.
We invented a new algorithm analysis framework to find out.
Beyond Smoothed Analysis: Analyzing the Simplex Method by the Book
Narrowing the gap between theory and practice is a longstanding goal of the algorithm analysis community. To further progress our understanding of how algorithms work in practice, we propose a new alg...
arxiv.org
October 27, 2025 at 1:43 AM
The simplex algorithm is super efficient. 80 years of experience says it runs in linear time. Nobody can explain _why_ it is so fast.
We invented a new algorithm analysis framework to find out.
We invented a new algorithm analysis framework to find out.
Reposted by Jim Luedtke
Any serious future for democracy in America requires us to get rid of single-member districts. It is the only long-term solution to this nonsense.
October 22, 2025 at 3:42 PM
Any serious future for democracy in America requires us to get rid of single-member districts. It is the only long-term solution to this nonsense.
Reposted by Jim Luedtke
🎉 Our very own Professor Laura Albert has been named a 2025 INFORMS Fellow!
This prestigious honor recognizes her outstanding contributions to operations research, analytics, and data science. 💡📊
We’re so proud of you, Laura — keep changing the world!
@INFORMS
This prestigious honor recognizes her outstanding contributions to operations research, analytics, and data science. 💡📊
We’re so proud of you, Laura — keep changing the world!
@INFORMS
October 21, 2025 at 3:01 PM
🎉 Our very own Professor Laura Albert has been named a 2025 INFORMS Fellow!
This prestigious honor recognizes her outstanding contributions to operations research, analytics, and data science. 💡📊
We’re so proud of you, Laura — keep changing the world!
@INFORMS
This prestigious honor recognizes her outstanding contributions to operations research, analytics, and data science. 💡📊
We’re so proud of you, Laura — keep changing the world!
@INFORMS
Reposted by Jim Luedtke
@sophie.huiberts.me is featured in a Quanta magazine article about the simplex method.
www.quantamagazine.org/researchers-...
www.quantamagazine.org/researchers-...
Researchers Discover the Optimal Way To Optimize | Quanta Magazine
The leading approach to the simplex method, a widely used technique for balancing complex logistical constraints, can’t get any better.
www.quantamagazine.org
October 15, 2025 at 7:28 AM
@sophie.huiberts.me is featured in a Quanta magazine article about the simplex method.
www.quantamagazine.org/researchers-...
www.quantamagazine.org/researchers-...
Reposted by Jim Luedtke
Periodic appreciation post for this gem of a review by Hannah Bast and coauthors. If you think you know how to compute shortest paths... trust me, you don't. I can give you one spoiler though: preprocessing the graph helps A LOT.
doi.org/10.1007/978-...
doi.org/10.1007/978-...
October 13, 2025 at 3:40 PM
Periodic appreciation post for this gem of a review by Hannah Bast and coauthors. If you think you know how to compute shortest paths... trust me, you don't. I can give you one spoiler though: preprocessing the graph helps A LOT.
doi.org/10.1007/978-...
doi.org/10.1007/978-...
Reposted by Jim Luedtke
@jannisku.bsky.social is giving a very interesting talk on explainable (integer) optimization at the @euroorml.bsky.social seminar, highlighting counterfactual explanations before diving on new work with Coherent Local Explanations for Mathematical Optimization (CLEMO): arxiv.org/abs/2502.04840
October 13, 2025 at 3:31 PM
@jannisku.bsky.social is giving a very interesting talk on explainable (integer) optimization at the @euroorml.bsky.social seminar, highlighting counterfactual explanations before diving on new work with Coherent Local Explanations for Mathematical Optimization (CLEMO): arxiv.org/abs/2502.04840
Reposted by Jim Luedtke
We are hiring two faculty positions in ISyE at UW-Madison
Please come and join us!
jobs.wisc.edu/jobs/assista...
jobs.wisc.edu/jobs/assista...
Please come and join us!
jobs.wisc.edu/jobs/assista...
jobs.wisc.edu/jobs/assista...
Assistant/Associate/Full Professor in Industrial & Systems Engineering (RISE AI) - Madison, Wisconsin, United States
Current Employees: If you are currently employed at any of the Universities of Wisconsin, log in to Workday to apply through the internal application process.Job Category:FacultyEmployment Type:Regula...
jobs.wisc.edu
October 7, 2025 at 12:35 PM
We are hiring two faculty positions in ISyE at UW-Madison
Please come and join us!
jobs.wisc.edu/jobs/assista...
jobs.wisc.edu/jobs/assista...
Please come and join us!
jobs.wisc.edu/jobs/assista...
jobs.wisc.edu/jobs/assista...
Reposted by Jim Luedtke
"Republicans run the entire government but can't keep it open"
That's it. That's the whole story.
That's it. That's the whole story.
Yes. (And still getting "standoff" BS and "who will blink first" and "who will voters blame" from news.)
Trump and MAGA control the *entire* government. It's a simple fact:
- White House
- Senate
- House
- Scotus
- OMB (to the hilt)
- Every regulatory agency
They're in command. It's on them.
Trump and MAGA control the *entire* government. It's a simple fact:
- White House
- Senate
- House
- Scotus
- OMB (to the hilt)
- Every regulatory agency
They're in command. It's on them.
I do not understand why they cannot get the headlines right.
Just follow the gop playbook!
“Repubs control it all! The shutdown is on them!”
As nauseum.
Don’t lead with the nuance.
Just follow the gop playbook!
“Repubs control it all! The shutdown is on them!”
As nauseum.
Don’t lead with the nuance.
September 30, 2025 at 10:32 PM
"Republicans run the entire government but can't keep it open"
That's it. That's the whole story.
That's it. That's the whole story.
Reposted by Jim Luedtke
Here is a list of Winter / Summer schools on AI, data science, optimization, and related topics in operations research happening between October of 2025 and February of 2026:
thiagoserra.com/2025/09/22/w...
thiagoserra.com/2025/09/22/w...
Winter 2025 / 2026 schools on artificial intelligence, data science, machine learning, optimization, and other relevant topics in operations research
Following up on a recent post about Summer 2025 schools, here is a new list. The purpose of organizing this is to help graduate students find a summer school to gain skills related to operations re…
thiagoserra.com
September 22, 2025 at 7:32 PM
Here is a list of Winter / Summer schools on AI, data science, optimization, and related topics in operations research happening between October of 2025 and February of 2026:
thiagoserra.com/2025/09/22/w...
thiagoserra.com/2025/09/22/w...
Reposted by Jim Luedtke
settings > content & media > autoplay video & gifs = off
September 10, 2025 at 6:59 PM
settings > content & media > autoplay video & gifs = off
Reposted by Jim Luedtke
📢 New in JMLR (w @rajivsambharya.bsky.social)! 🎉 Data-driven guarantees for classical & learned optimizers via sample bounds + PAC-Bayes theory.
📄 jmlr.org/papers/v26/2...
💻 github.com/stellatogrp/...
📄 jmlr.org/papers/v26/2...
💻 github.com/stellatogrp/...
September 8, 2025 at 1:10 PM
📢 New in JMLR (w @rajivsambharya.bsky.social)! 🎉 Data-driven guarantees for classical & learned optimizers via sample bounds + PAC-Bayes theory.
📄 jmlr.org/papers/v26/2...
💻 github.com/stellatogrp/...
📄 jmlr.org/papers/v26/2...
💻 github.com/stellatogrp/...
Reposted by Jim Luedtke
I wrote a tutorial inspired by my experience conducting research with undergraduate students who knew how to code, but were yet to learn about optimization.
What is the Best Way to Do Something? A Discreet Tour of Discrete Optimization: github.com/thserra/disc...
What is the Best Way to Do Something? A Discreet Tour of Discrete Optimization: github.com/thserra/disc...
GitHub - thserra/discreet: What is the Best Way to Do Something? A Discreet Tour of Discrete Optimization
What is the Best Way to Do Something? A Discreet Tour of Discrete Optimization - thserra/discreet
github.com
September 8, 2025 at 4:22 PM
I wrote a tutorial inspired by my experience conducting research with undergraduate students who knew how to code, but were yet to learn about optimization.
What is the Best Way to Do Something? A Discreet Tour of Discrete Optimization: github.com/thserra/disc...
What is the Best Way to Do Something? A Discreet Tour of Discrete Optimization: github.com/thserra/disc...
Reposted by Jim Luedtke
I wrote about the tragic death of Adam Raine and the venal negligence of "AI Safety." www.argmin.net/p/the-banal-...
The Banal Evil of AI Safety
Chatbot companies are harmful and dishonest. How can we hold them accountable?
www.argmin.net
August 28, 2025 at 2:30 PM
I wrote about the tragic death of Adam Raine and the venal negligence of "AI Safety." www.argmin.net/p/the-banal-...
Reposted by Jim Luedtke
Nobody covers Wisconsin politics better than @danshafer.bsky.social & you should take advantage of this great deal
It was one year ago that we announced The Recombobulation Area was joining the @civicmedia.us network!
We're celebrating with a subscription sale (35% off!) and Brewers ticket giveaway!
Let's recombobulate: www.therecombobulationarea.news/p/anniversar...
We're celebrating with a subscription sale (35% off!) and Brewers ticket giveaway!
Let's recombobulate: www.therecombobulationarea.news/p/anniversar...
ANNIVERSARY SALE: One year with Civic Media!
We're celebrating one year with Civic Media with a subscription sale (35% off!) and a Brewers ticket giveaway (go Crew!!).
www.therecombobulationarea.news
August 27, 2025 at 7:23 PM
Nobody covers Wisconsin politics better than @danshafer.bsky.social & you should take advantage of this great deal
Reposted by Jim Luedtke
Israel had every right to respond to Hamas' 7 Oct 2023 attacks.
But this has NOT been a proportionate response: it has been an escalating campaign of war crimes, crimes against humanity & genocide as the world just watches.
It is fair to hold Israel to a higher standard than Hamas terrorists. 5/5
But this has NOT been a proportionate response: it has been an escalating campaign of war crimes, crimes against humanity & genocide as the world just watches.
It is fair to hold Israel to a higher standard than Hamas terrorists. 5/5
August 26, 2025 at 10:49 AM
Israel had every right to respond to Hamas' 7 Oct 2023 attacks.
But this has NOT been a proportionate response: it has been an escalating campaign of war crimes, crimes against humanity & genocide as the world just watches.
It is fair to hold Israel to a higher standard than Hamas terrorists. 5/5
But this has NOT been a proportionate response: it has been an escalating campaign of war crimes, crimes against humanity & genocide as the world just watches.
It is fair to hold Israel to a higher standard than Hamas terrorists. 5/5
Reposted by Jim Luedtke
The #FutureBAProf workshop continues with Tallys Yunes, the 22-time winner of University of Miami Herbert Business School Excellence in Teaching award, sharing about teaching in business schools.
1/2
1/2
August 14, 2025 at 4:18 PM
The #FutureBAProf workshop continues with Tallys Yunes, the 22-time winner of University of Miami Herbert Business School Excellence in Teaching award, sharing about teaching in business schools.
1/2
1/2
Reposted by Jim Luedtke
A new study led by Prof. Cathy Wu and colleagues reveals that eco-driving measures, such as dynamically adjusting vehicle speeds to reduce stopping and excessive acceleration, can cut carbon emissions between 11 and 22 percent. news.mit.edu/2025/eco-dri...
Eco-driving measures could significantly reduce vehicle emissions
Implementing co-driving techniques, like the use of intelligent speed controls to mitigate congestion at traffic lights, can significantly reduce intersection carbon dioxide emissions without…
news.mit.edu
August 11, 2025 at 2:15 PM
A new study led by Prof. Cathy Wu and colleagues reveals that eco-driving measures, such as dynamically adjusting vehicle speeds to reduce stopping and excessive acceleration, can cut carbon emissions between 11 and 22 percent. news.mit.edu/2025/eco-dri...
Fascinating video about the history of linear programming
This is about one of my greatest inspirations. It would mean a lot to me if you gave it a watch
Lessons from Paula Harris / by Sophie Huiberts
YouTube video by Mixed Integer Programming
www.youtube.com
August 11, 2025 at 3:37 PM
Fascinating video about the history of linear programming
Reposted by Jim Luedtke
New piece, out in the Sigecom Exchanges! It's my first solo-author piece, and the closest thing I've written to being my "manifesto." #econsky #ecsky
arxiv.org/abs/2507.03600
arxiv.org/abs/2507.03600
August 11, 2025 at 1:25 PM
New piece, out in the Sigecom Exchanges! It's my first solo-author piece, and the closest thing I've written to being my "manifesto." #econsky #ecsky
arxiv.org/abs/2507.03600
arxiv.org/abs/2507.03600
Reposted by Jim Luedtke
“Staying sane on the tenure track” by Shane Henderson. Written in 2008 but still good advice for junior faculty. people.orie.cornell.edu/shane/pubs/S... #orms
people.orie.cornell.edu
August 6, 2025 at 2:50 PM
“Staying sane on the tenure track” by Shane Henderson. Written in 2008 but still good advice for junior faculty. people.orie.cornell.edu/shane/pubs/S... #orms