Chapter 6 of the upcoming book on #bilevel #optimization:
General properties of mixed-integer linear bilevel problems.
Classic relaxations, infeasibility via lower-level unboundedness and how to test this up-front, existence of solutions, the refinement problem, complexity, reformulations, ...
The show must go on ... final proof-reading of Chapter 5: "Algorithms for Linear Bilevel Problems".
We discuss three main methods:
(i) The "historic" and simplex-inspired Kth-best algorithm
(ii) Complementarity-Based Branch-and-Bound
(iii) Penalty Alternating Direction Method
๐ข Plenary speakers for #ISMP2027
We are pleased to announce the plenaries for the 26th International Symposium on Mathematical Programming:
Daniel Bienstock
Jim Luedtke @optimizer.bsky.social
Thomas Rothvoss
Katya Scheinberg
Defeng Sun
๐๏ธ July 25โ30, 2027โจ
๐Amsterdam
๐ ismp2027.mathopt.nl
#MOS
#Bilevel book proof-reading update.
Chapter 3: Single-level reformulations for convex lower-level problems ...
A few keywords: Optimal-value function, KKT, strong-duality, big-M, McCormick, IIC, local vs. global solutions, SOS1 conditions, ...
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
Join us on March 5 for my #orms talk about uncertain #bileveloptimization!
Free Tuesday afternoon? Then I have something for you!
๐ We're launching the #BOS Webinar Seriesโa bi-weekly seminar on theoretical, computational, and applied #BilevelOptimization
๐ Tuesdays at 4 pm CET via MS Teamsโจ
๐๏ธ 40- or 2x20-minute talks + discussionโจ
๐ bileveloptimization.org/bos_webinar
Proof-reading chapter 2: Optimistic vs pessimistic #bilevel problems.
What is a pessimistic problem? Why is it different? And why is it actually not as different as many people thought for a long time โฆ
#orms #optimization
The 6th #EUROYoungWorkshop is coming to #Lugano, Switzerland ๐จ๐ญ| Oct 14-16, 2026
Join us for 3 days of talks, networking & social eventsโinspiring plenaries and lakeside charm await!
Abstract submission:ย 10 Mar โ 15 Apr
Registration: 1 May โ 1 Jun
๐ euroyoung.eu/lugano2026
Proof-reading our #bilevel #optimization book.
Today: Chapter 1 about what it is all about ๐
From the content: many formal and informal examples such as pricing, toll setting, energy markets, critical infrastructure defense, interdiction problems (max-flow & knapsack)
... plus ...
1/2
A new book is coming:
"Linear and Mixed-Integer Bilevel Optimization: Theory and Algorithms"
by Ivana Ljubiฤ, @yasminebeck.bsky.social, and myself.
Let's start the last round of proof-reading! Stay tuned for regular updates on its content.
#orms #bilevel #optimization #algorithms #textbook
Excited to be part of this seasonโs MOSS speaker lineup and to present what Iโve been working on lately. Donโt miss out on MOSS every first Thursday of the month, looking forward to seeing many of you there!
#orms
The plenary speakers of the #ICBO2026 are confirmed.
Amy Greenwald, Brown University, US
Leonardo Lozano, University of Cincinnati, US
Shoham Sabach, Cornell University, US
More information you can find here: bileveloptimization.org/icbo/2026/in....
See you in Pittsburgh this year!
Proof-reading our new book on bilevel optimization. The content is almost finalized โฆ
Most likely, you will find it online in 2026!
By the way: our = @yasminebeck.bsky.social, Ivana Ljubic, and myself!
Follow here for more updates during the next weeks and months!
I cannot think of a better way to start the new year! Join us on January 27, 2026, for #ORAwarenessDay
#orms
The end of the year finale EURO WISDOM #YW4OR Webinar of 2025!
Great talks by @yasminebeck.bsky.social, Dr Monaci, @jasoneramirez.bsky.social and great discussion questions by @vidalthi.bsky.social
Recording soon on YouTube! #WomenInSTEM
Sure, you can have my other 99 problems ๐
A while ago, I finished a language course on #Duolingo and was *deeply* disappointed that Duo, the owl, did NOT dance for me.
But todayโฆ dreams come true ๐ฆ๐
Duo is finally dancing! Apparently it just needed some time to warm up ๐ณ๐ฑ
Today, we had the last EURO WISDOM YW4OR Webinar of 2025!
๐ Dr Beck @yasminebeck.bsky.social, Dr Monaci, Dr Ramirez Ayerbe @jasoneramirez.bsky.social for the presentations!
๐ Prof Vidal @vidalthi.bsky.social for the questions!
Recording soon in YouTube!
@euro-wisdom.bsky.social #WomenInSTEM
Save the date!
The International Conference on Bilevel Optimization will take place from August 2-5, 2026, at the CMU and the University of Pittsburgh, USA!
Here's all what you need to know right now:
bileveloptimization.org/icbo/2026/in...
#YW4OR call for applications is still open #orms, please apply using this form (deadline November 14):
๐
docs.google.com/forms/d/e/1F...
This was hard work but now we are happy!
The #BOBILib paper has today been accepted for publication in Mathematical Programming Computation!
Here's the final version of the preprint: optimization-online.org/wp-content/u...!
And here's the website bobilib.org!
Spread the word and use it! :-)
Thanks to the best supervisor! ๐
If you are interested, feel free to check out my award-winning thesis. Itโs only ~300 pages ๐
TL; DR: If you are attending #OR2025 in Bielefeld, you can still join me today at TC-4 in H6, where I will present (some of) the results.
#orms @unitrier.bsky.social
group picture of the workshop participants. its a crowd, 60 to 80 people i think
That's it for this #EuroMIP25. Thanks everyone for making this workshop a success
Thanks!!
I couldnโt have asked for better co-authors, collaborators, or mentors, thank you for everything!
๐ง EURO Best EJOR Paper Award 2025 โ Review Category
#EABEP2025 | Sponsored by Elsevier
๐ A Survey on Bilevel Optimization Under Uncertainty
๐ฅ Yasmine Beck | Ivana Ljubic | Martin Schmidt
๐ Trier Univ. & ESSEC Business School
๐ buff.ly/h8qemcB
#EJOR #Elsevier
๐ฆ EURO Doctoral Dissertation Award 2025 โ Winner!
๐ Yasmine Beck (ESSEC)
๐ ๐ถ๐
๐ฒ๐ฑ-๐๐ป๐๐ฒ๐ด๐ฒ๐ฟ ๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐ฎ๐๐ถ๐ผ๐ป ๐ง๐ฒ๐ฐ๐ต๐ป๐ถ๐พ๐๐ฒ๐ ๐ณ๐ผ๐ฟ ๐ฅ๐ผ๐ฏ๐๐๐ ๐๐ถ๐น๐ฒ๐๐ฒ๐น ๐ฃ๐ฟ๐ผ๐ฏ๐น๐ฒ๐บ๐ ๐๐ถ๐๐ต ๐๐ฒ๐ฟ๐ฒ-๐ฎ๐ป๐ฑ-๐ก๐ผ๐ ๐๐ผ๐น๐น๐ผ๐๐ฒ๐ฟ๐
๐ Abstract: lnkd.in/d3i_9Smw
#EDDA2025 #EURO2025
๐ฆ EURO Doctoral Dissertation Award 2025 โ Winner!
๐ Yasmine Beck (ESSEC)
๐ ๐ถ๐
๐ฒ๐ฑ-๐๐ป๐๐ฒ๐ด๐ฒ๐ฟ ๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐ฎ๐๐ถ๐ผ๐ป ๐ง๐ฒ๐ฐ๐ต๐ป๐ถ๐พ๐๐ฒ๐ ๐ณ๐ผ๐ฟ ๐ฅ๐ผ๐ฏ๐๐๐ ๐๐ถ๐น๐ฒ๐๐ฒ๐น ๐ฃ๐ฟ๐ผ๐ฏ๐น๐ฒ๐บ๐ ๐๐ถ๐๐ต ๐๐ฒ๐ฟ๐ฒ-๐ฎ๐ป๐ฑ-๐ก๐ผ๐ ๐๐ผ๐น๐น๐ผ๐๐ฒ๐ฟ๐
๐ Abstract: lnkd.in/d3i_9Smw
#EDDA2025 #EURO2025
๐ง EURO Best EJOR Paper Award 2025 โ Review Category
#EABEP2025 | Sponsored by Elsevier
๐ A Survey on Bilevel Optimization Under Uncertainty
๐ฅ Yasmine Beck | Ivana Ljubic | Martin Schmidt
๐ Trier Univ. & ESSEC Business School
๐ buff.ly/h8qemcB
#EJOR #Elsevier
