Itโs 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!
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...
Saving peer review from AI slop requires getting rid of anonymous submissions and reviews
togelius.blogspot.com/2026/03/savi...
Come see me speak about the new era of simplex method theory. Wednesday!
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
๐ข #ISMP2027 comes to Amsterdam!
The 26th International Symposium on Mathematical Programming will be held July 25โ30, 2027.
Join researchers from around the world to discuss advances, challenges, and opportunities in the theory and practice of mathematical optimization.
๐ ismp2027.mathopt.nl
#MOS
And... we are back on ๐! The first talk of the season will be delivered by Sophie Huiberts (CNRS, @sophie.huiberts.me), on โฐ 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...
Have you noticed how navigation apps include walking & waiting for public transit, but excludes parking & walking for driving? After being late a few times ๐ , we finally did. We got curious: what if these apps account for parking?
A simpler example is l-S inequalities for lot sizing (eg multiple products with some connecting constraint like a joint capacity), but I suspect Gurobi does very well on that problem with general purpose cuts
Unless Gurobi is now doing mixing cuts on its own, in which case one would not expect benefit from implementing them
Yes, with the extended formulation, extra cuts arenโt helpful, but the mixing cuts are critical if using the original compact formulation
Mixing cuts applied to finite support chance constraint is likely a good example link.springer.com/article/10.1...
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
Springer advertisement for the "Branch-and-Price" book
our #openaccess book on "branch-and-price" is finally published; you can download it here link.springer.com/book/10.1007...
#orms @springernature.com
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.
Weโll let the childrenโs words speak for themselves. ๐งต
๐ฃ ๐ฃ๐ผ๐๐๐ฑ๐ผ๐ฐ ๐ผ๐ฝ๐ฒ๐ป๐ถ๐ป๐ด๐ ๐ถ๐ป ๐บ๐ ๐ด๐ฟ๐ผ๐๐ฝ!
Iโm looking to hire ๐ญโ๐ฎ ๐ฝ๐ผ๐๐๐ฑ๐ผ๐ฐ๐ to work with us across the groupโs research areas, including:
๐ค Deep reinforcement learning
๐ฆ Traffic modeling & control
๐ง Neural combinatorial optimization
A reminder to the news media: โconflicting accountsโ 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.
picture of Alex Pretti
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.
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 situationโand I have no faith he will stop. The Republican Congress must join us to end this. Enough.
Itโs -9 degrees. Downtown Minneapolis is packed for the anti-ICE rally and the crowd keeps growing
Happy to chair this yearโs 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!
pointing at the hamburger menu icon in the top left hand corner of a mobile bluesky app screen
settings menu option circled
content and media menu option circled
autoplay videos and gifs toggled off
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
Iโm happy to share that Iโm starting my term as President of @informs.bsky.social Section on Location Analysis. I look forward to continuing to serve our community, leading SOLA activities, supporting our members, and strengthening the impact of location analysis research and applications.
I've written an end of year substack post about tracking Trump, where we are ending the year and some implications for Europe and for me personally...
christinapagel.substack.com/p/personal-r...
"Nearly 80 years later, the simplex method is still among the most widely used tools when a logistical or supply-chain decision needs to be made under complex constraints."
only half followed the description of the simplex method in here but super interesting anyways
www.wired.com/story/resear...
New preprint! ๐ Data-driven convergence guarantees for first-order methods via PEP + Wasserstein DRO.
Less pessimistic probabilistic rates that reflect how your solver actually behaves ๐ฏ
๐ arxiv.org/abs/2511.17834
๐ป github.com/stellatogrp/dro_pep
w/ Jisun Park & Vinit Ranjan #optimization #fom
Care about gun control?
Climate change?
Gun control?
Abortion rights?
Gun control?
Universal health care?
Gun control?
Higher education funding?
Gun control?
Abolishing ICE?
Gun control?
Ending murder on the high seas?
Gun control?
Etc.
Your platform is <institutional reform>
After 18+ years working for Maplesoft, I was "downsized" on Black Friday and I am currently on the lookout for new opportunities. I will be looking in earnest in the new year, but any leads on math programming/teaching work (especially in Los Angeles) would be appreciated.
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Click here to support the network of voices that keeps our public conversation honest and informed: n.pr/4pCcFIx
