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Jim Luedtke

@optimizer.bsky.social
444 followers 187 following 32 posts

Professor, Stochastic and Integer Optimizer, Dad

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Reposted by Jim Luedtke
Clément Canonne @ccanonne.github.io · 27/09/2026
When I say "this is not good" let me be more specific: (1) this is not good for academia (destroying the current system before it has a chance to reassess its incentive structure), (2) it is not good for science (flooding the gates with ill-understood results and insightless or badly written proofs)
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Matt Novak @paleofuture.bsky.social · 26/09/2026
This is the trailer that all the major platforms refuse to run as a paid ad:
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Erin Fogg says Free Link @criminalerin.bsky.social · 21/09/2026
We're all having such a bad time
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uwisye.bsky.social @uwisye.bsky.social · 14/09/2026
Happy #ISEDay! Today we celebrate industrial and systems engineering and the students, faculty, alumni, and partners who shape the field. ISE Day is a global movement empowering the community and highlighting the impact of the discipline. #ISEDay2026
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Oxford Mathematics @oxfordmathematics.bsky.social · 11/09/2026
AI is ravenous and is eating mathematicians' lunch. A long-standing problem is solved, others are in its sights. But is this more than just a problem about problems? Here's Fields Medallist James Maynard. Read the Math and AI Declaration by 25 Fields Medallists: mathandai.org
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Jen Jennings @jenjennings.bsky.social · 09/09/2026
Children with medical disabilities deserve basic dignity and support at school. But private schools receiving public dollars can deny this 7 year old accommodations & push him out. We are publicly funding schools without requiring them to accept the public obligations that come with the money.
iowastartingline.com
Iowa mom says private school discriminated against her child
Excerpt: Maria Paredes says a Des Moines private school kicked her young son out over his disability.
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Juspreet Singh Sandhu @freegaussians.bsky.social · 09/09/2026
For the record: $22 million is ~70 math.PR grants from NSF’s MPS division. Each for 2 collaborators, gives 1 month summer salary, supports 1 grad student for its length: 2 yrs. That’s 140 years: In 7, I can promise substantial progress on SL/Parisi, PHA papers (1-6), PF/SYK<->SYK & quantum p-spin.
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Vince Vatter @vatter.bsky.social · 25/08/2026
Published today! Our article in Math Horizons about how Robert and I lied to players for three years in our game Digit Party, and how we used integer linear programming to stop.
First page of "Digit.party: Three years of lying about high scores" by Robert Brignall and Vincent Vatter, published in Math Horizons.
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Governor Tony Evers @govevers.wisconsin.gov · 27/08/2026
And I just renamed Lake Michigan Lake Wisconsin. See, I can sign napkins that say things, too.
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Jim Luedtke @optimizer.bsky.social · 24/08/2026
Very sad to hear this news
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Jacquelyn Gill @jacquelyngill.bsky.social · 19/08/2026
University professors generally do not make very much relative to our training levels. Most of us, especially in STEM, could make a lot more in industry (and deal with a lot less bureaucracy). Grant money mostly goes to paying students, postdocs, and staff, and is heavily vetted and scrutinized.
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ProPublica @propublica.org · 14/08/2026
Some children in Dilley were so distraught they cut themselves or talked about suicide, parents told ProPublica. They said kids lost their appetites after finding worms and mold on their food, had trouble sleeping, and were constantly sick. (Published February)
propublica.org
The Kids Trump Sent to ICE’s Dilley Detention Center
ProPublica went inside the immigrant detention center for families in Dilley, Texas. Children held there told us about the anguish of being ripped from their lives in the United States and the fear of...
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Ben Recht @beenwrekt.bsky.social · 14/08/2026
I feel like I'll be coming back to this a lot...
argmin.net
The Least Agentic People Alive
The arms race of deferring agency and the dark acquiescence to robotic bureaucracy.
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Katie Mack @astrokatie.com · 06/08/2026
I understand that funding bodies want to go all in on AI as the shiny new innovation thing. But if all the grants start going to AI at the expense of everything else then the research sector is going to end up looking like a farm with dozens of threshers hacking away in a field with no wheat.
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Arthur Charpentier @freakonometrics.bsky.social · 06/08/2026
"Prediction Markets Let You Bet on Whether a Wildfire Will Burn Down Your Town" www.wired.com/story/predic...
wired.com
Prediction Markets Let You Bet on Whether a Wildfire Will Burn Down Your Town
Wildfire survivors call fire-prediction markets “morally reprehensible” and worry they could increase the risk of arson.
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Dan Shafer @danshafer.bsky.social · 28/07/2026
Today is the first day of early, in-person absentee voting in Wisconsin for the Aug. 11 partisan primary. The big race is the Democratic primary for governor, but there are many more up and down the ballot where you may have an important choice to make. Be prepared: myvote.wi.gov/en-us/Whats-...
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Stefan Marciniak @profmarciniak.bsky.social · 23/06/2026
Longterm, meticulous science 1970s mutation identified 2000s lentiviral vectors made reliable 2012 CRISPR makes editing feasible 2017 first durable lentiviral cures 2020 first CRISPR‑edited SCD patients 2023–24 first approved gene‑addition & CRISPR cures pmc.ncbi.nlm.nih.gov/articles/PMC...
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uwisye.bsky.social @uwisye.bsky.social · 23/06/2026
We're hiring! Now seeking teaching faculty/professor candidates for fall 2026. Spread the word or apply now! go.wisc.edu/936yf2
go.wisc.edu
Jobs - College of Engineering - University of Wisconsin-Madison
UW-Madison College of Engineering: Outstanding research, education and service to society.
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ISMP 2027 – Amsterdam @ismp2027.bsky.social · 10/06/2026
📢 Travel discount for #ISMP2027 participants Benefit from a 10% discount on Air France and KLM flights: ismp2027.mathopt.nl/img/travel/f... ✈️ Reservations: July 25, 2026 – July 30, 2027 ✈️ Departures: July 18–30, 2027 ✈️ Returns: July 25, 2027 – August 6, 2027 🔗 ismp2027.mathopt.nl #MOS
ismp2027.mathopt.nl
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Sophie Labelle @assignedmale.bsky.social · 30/05/2026
A legend, an icon and a trailblazer.
4 frame comic. first frame shows the ibm building, 2nd shows a smartphone, 3rd shows a trans flag, and 4th shows Lynn Conway, smiling. Text reads: After Lynn Conway transitioned in 1968, she lost her family and was fired from her job at IBM. she went on to pioneer the microchip technology that powers your smartphone. She has been a tireless advocate for trans rights and an inspiration for trans leaders everywhere. She was a legend, an icon and a trailblazer. She will be thoroughly missed.
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Ben Grimmer @profgrimmer.bsky.social · 23/05/2026
I'm excited to share some joint work done with TaeHo Yoon. We considered algorithm design for fixed-point problems. This area models gradient descent, minimax optimization, and more. Below, I give the wild ride of this paper. Mathematically, it is gorgeous.
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Andrew Lawrence @ndrew.bsky.social · 18/05/2026
the president is raiding the treasury to put your tax dollars into this mans personal checking account as a reward for what hes doing in this picture
A picture of a man inside the Capitol rotunda on January 6 2021. He is wearing full camo tactical gear, masked, carrying zip ties and climbing over a bannister in the gallery
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Ellen Vitercik @ellen-v.bsky.social · 18/05/2026
Can machine learning improve discrete optimization algorithms without sacrificing theoretical guarantees? This was the central question of the talk I gave this spring at a few schools (UCSD, UIC, Yale, Penn): Machine Learning for Discrete Optimization: Theoretical Foundations. (🧵 1/7)
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Marco Lübbecke @mluebbecke.bsky.social · 06/05/2026
Mathematical Optimization, Full Professorship (W2) @rwth.bsky.social areas: continuous, stochastic, discrete optimization, convex/non-convex analysis, variational methods, non-smooth/set-valued analysis, optimal control, and/or inverse problems #orms berufungsportal.rwth-aachen.de
berufungsportal.rwth-aachen.de
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Thiago Serra @thserra.bsky.social · 23/04/2026
Attention all PhD students and postdocs approaching the academic job market, and especially those not in business analytics departments: the application deadline for the FutureBAProf is April 30! tippie.uiowa.edu/news-events/...
tippie.uiowa.edu
Business Analytics FutureBAProf - About
FutureBAProf is a one-and-a-half-day workshop designed to demystify the field of business analytics while supporting emerging scholars preparing for the academic job market.
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Mitra Sharafi @mitrasharafi.bsky.social · 15/04/2026
PUB. DAY! Fear of the False: Forensic Science and the Law of Crime in Colonial South Asia is officially out today. Available Open Access: www.cornellpress.cornell.edu/book/9781501... #legalhistory Outfit: red for bloodstain testing+flowered shirt for botanical poisons+poisoner's ring (for show only)
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Dan Shafer @danshafer.bsky.social · 07/04/2026
REMINDER: Wisconsin has same-day voter registration. So, if you haven’t registered or recently moved or anything like that, you can register at your polling place (with ID and proof of residence) TODAY. Every state should do this. It’s great that Wisconsin does this. Go vote.
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Thiago Serra @thserra.bsky.social · 03/04/2026
The recording of my talk at University of Wisconsin-Madison is now online: m.youtube.com/watch?v=zL3n... Thanks again @optimizer.bsky.social, @jefflinderoth.bsky.social, @lauraalbertphd.bsky.social, @madsjw.bsky.social, and all other Badgers!
m.youtube.com
Thiago Serra - Optimization over Trained Neural Networks: Going Large with Gradient-Based Algorithms
YouTube video by UWMadison SILO Seminar
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ISMP 2027 – Amsterdam @ismp2027.bsky.social · 25/03/2026
📢 Semi-Plenary Speakers for #ISMP2027! We are pleased to announce the semi-plenaries for the 26th International Symposium on Mathematical Programming. Join them to explore advances, challenges, and opportunities in mathematical optimization. 🗓️ July 25–30, 2027 📍Amsterdam 🔗 ismp2027.mathopt.nl #MOS
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Rolf van der Hulst @rolfvanderhulst.bsky.social · 16/03/2026
I am happy to share my latest work ``Folding Mixed-Integer Linear Programs and Reflection Symmetries'', where I formulate two new presolving techniques for handling symmetries in linear programs and mixed-integer linear programs. Check out the preprint here: lnkd.in/efgYeVSJ lnkd.in/eGpim7U9
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
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Thiago Serra @thserra.bsky.social · 12/03/2026
Thanks for all the OptiBeer @optimizer.bsky.social @jefflinderoth.bsky.social and for the OptiWine @lauraalbertphd.bsky.social Heading back to Corn Land from Dairy Land after a day packed with very interesting research discussions
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Jim Luedtke @optimizer.bsky.social · 05/03/2026
It’s an incredible honor to be a plenary speaker at #ISMP2027 alongside these amazing optimizers. I look forward to seeing all my optimization friends in Amsterdam!
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Thiago Serra @thserra.bsky.social · 03/03/2026
There are many things about preparing and presenting slides that I keep repeating to students, so I figured that I should put them down in writing. I do think that they help a lot. (And if I am doing it, why not share it more broadly?) thiagoserra.com/2026/03/03/m...
thiagoserra.com
My presentation philosophy
There are many things about preparing and presenting slides that I keep repeating to students, so I figured that I should put them down in writing. I do think that they help a lot. (And if I am doi…
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Julian Togelius @togelius.bsky.social · 02/03/2026
Saving peer review from AI slop requires getting rid of anonymous submissions and reviews togelius.blogspot.com/2026/03/savi...
togelius.blogspot.com
Saving peer review from AI slop requires getting rid of anonymous submissions and reviews
The scientific ecosystem is struggling to deal with AI-written papers, and this is a great opportunity to revisit how we publish, where, and...
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Sophie Huiberts @sophie.huiberts.me · 01/03/2026
Come see me speak about the new era of simplex method theory. Wednesday!
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Thiago Serra @thserra.bsky.social · 27/02/2026
Mark your calendars and start optimizing your resources and schedules: the 2027 International Symposium on Mathematical Programming will be held from July 25 to to 30 in beautiful Amsterdam! Neil Yorke-Smith and I will organize the stream Discrete Optimization with Machine Learning. #ismp2027
ismp2027.mathopt.nl
ISMP 2027 | Home
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ISMP 2027 – Amsterdam @ismp2027.bsky.social · 27/02/2026
📢 #ISMP2027 comes to Amsterdam! The 26th International Symposium on Mathematical Programming will be held July 25–30, 2027. Join researchers from around the world to discuss advances, challenges, and opportunities in the theory and practice of mathematical optimization. 🔗 ismp2027.mathopt.nl #MOS
ismp2027.mathopt.nl
The 26th International Symposium on Mathematical Programming will be held in Amsterdam, The Netherlands, from July 25th through July 30th, 2027. The event is the symposium of the Mathematical Optimization Society (MOS).
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TCS+ @tcsplus.bsky.social · 23/02/2026
And... we are back on 🎉! The first talk of the season will be delivered by Sophie Huiberts (CNRS, @sophie.huiberts.me), on ⏰ March 4 (10am PT, 1pm ET, 19:00 CET): "Analyzing the Simplex Method by the Book" RSVP to receive the link (one day before the talk): forms.gle/aD621bCwswjB...
forms.gle
TCS+ RSVP: Sophie Huiberts (2026/03/04)
Title: Analyzing the Simplex Method by the Book
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Cathy Wu @cathywu.bsky.social · 19/02/2026
Have you noticed how navigation apps include walking & waiting for public transit, but excludes parking & walking for driving? After being late a few times 😅, we finally did. We got curious: what if these apps account for parking?
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Alexander Helber @ahelber.bsky.social · 17/02/2026
Question for #orms people: do you know any problem-specific cutting planes that are not too hard to explain and separate and would improve performance compared to a baseline MIP solver (e.g. SCIP, Gurobi)? Asking because its more fun for students if they implement something and it helps performance
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Marco Lübbecke @mluebbecke.bsky.social · 10/02/2026
our #openaccess book on "branch-and-price" is finally published; you can download it here link.springer.com/book/10.1007... #orms @springernature.com
Springer advertisement for the "Branch-and-Price" book
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ProPublica @propublica.org · 09/02/2026
1/ ProPublica collected handwritten letters in mid-January from children held at the Dilley Immigration Processing Center, the same facility where 5-year-old Liam Conejo Ramos was taken. Hundreds of kids are still detained. We’ll let the children’s words speak for themselves. 🧵
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Cathy Wu @cathywu.bsky.social · 03/02/2026
📣 𝗣𝗼𝘀𝘁𝗱𝗼𝗰 𝗼𝗽𝗲𝗻𝗶𝗻𝗴𝘀 𝗶𝗻 𝗺𝘆 𝗴𝗿𝗼𝘂𝗽! I’m looking to hire 𝟭–𝟮 𝗽𝗼𝘀𝘁𝗱𝗼𝗰𝘀 to work with us across the group’s research areas, including: 🤖 Deep reinforcement learning 🚦 Traffic modeling & control 🧠 Neural combinatorial optimization
cathywu.github.io
Prospective Members
Faster, evidence-based decisions for sociotechnical systems
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Katie Mack @astrokatie.com · 25/01/2026
A reminder to the news media: “conflicting accounts” is what you say BEFORE the incontrovertible video evidence appears. After that, your job is to ask why one side is lying, not to repeat the lie and pretend no one knows the truth.
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Don Moynihan @donmoyn.bsky.social · 24/01/2026
Alex Pretti was an ICU nurse serving veterans. He died trying to protect protestors being assaulted. A group of anonymous & masked men fired chemicals into his face, beat him, disarmed him, and shot him in broad daylight in front of witnesses. Then his government smeared him & defended his murder.
picture of Alex Pretti
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Senator Patty Murray @murray.senate.gov · 24/01/2026
This looks like an execution. There must be an investigation. There must be accountability. Joining ICE does not give you license to murder. The President is escalating the situation—and I have no faith he will stop. The Republican Congress must join us to end this. Enough.
startribune.com
Live: Man shot and killed by federal agents in Minneapolis this morning, police chief says
A video appears to shows federal agents wrestling a man to the ground then shooting him. The Department of Homeland Security said the man was armed with a gun.
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max nesterak @maxnesterak.bsky.social · 23/01/2026
It’s -9 degrees. Downtown Minneapolis is packed for the anti-ICE rally and the crowd keeps growing
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Karmel S. Shehadeh @karmelshehadeh.bsky.social · 11/01/2026
Happy to chair this year’s Lifetime Achievement in Location Analysis Award committee with co-chairs Dr. Sibel Alumur Alev (University of Waterloo) and Dr. Rajan Batta (University at Buffalo). Please see the call for nominations and help spread the word!
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nora "the tea kobold" rude (they/them ze/hir) @nora.zone · 19/04/2025
to turn off autoplaying video on the bluesky mobile app select the icon in the top left corner go to settings go to content and media make sure "autoplay videos and gifs" is toggled off
pointing at the hamburger menu icon in the top left hand corner of a mobile bluesky app screensettings menu option circledcontent and media menu option circled autoplay videos and gifs toggled off
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