Erling Andersen
@e_d_andersenI tweet mostly about mathematical optimization and politics in English and Danish. I apologize for typos and missing words.
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I see more and more OR people on Bluesky. Follow me at bsky.app/profile/primal…
Maybe not following the news today and getting the final result tonight is the least painful path to the result.
Before Walz took the stage in Milwaukee tonight, I got a call from a number unlike any I'd ever seen. It ended with four zeroes. I picked it up. It was Joe Biden. 🧵
Please more good news this week.
BREAKING Moldova President Maia Sandu has defeated her pro-Russia rival and won reelection. This is great news for Europe and terrible news for Putin.
Så ramte sektordimensionering også de naturvidenskabelige ba.uddannelser på Københavns Universitet. På trods af lav arbejdsløshed og gode lønninger skal vi uddanne færre fysikere, dataloger og forsikringsmatematikere fra næste år. Klasse uddannelsespoltik, hva #dkpol #uddpol
Can't express how much I'm not enjoying living in Schrödinger's democracy where we'll open the box on Tuesday and find out if it's dead or not
Moreau's decomposition generalizes orthogonal decomposition from linear spaces to convex cones. convexoptimization.com/wikimization/i… en.wikipedia.org/wiki/Convex_co…
The greatest New Yorker cartoon of all time.
Statement on Washington Post’s refusal to endorse presidential candidate.
Når min virksomhed bliver pålagt krav for eks. ny regnskabslov, så får jeg da ikke erstatning. Ikke at jeg forstår argumentet, men ... »Nu ødelægger vi lige din bil. Så kan du få erstatning for det, den er værd, når den er ødelagt« jyllands-posten.dk/indland/ECE175…
You asked for it, so here it is. Visualizing CPU cache speeds relative to RAM. Cache optimization is important too!
So did Trump have his Biden moment.
Look that wasn’t just the usual “weird.” He couldn’t coherently answer the 4 questions he took then just transitioned to swaying to music for over 20 minutes. Just stood there. Half way says let’s take questions then changes his mind and calls for more music. He is fried.
Just learned that one of the motivations for APL was to make it easy to implement the simplex algorithm.
Deserved.
Congratulations to SIAM member Shuzhong Zhang of @UMNISyE, named a 2024 @INFORMS Fellow for his contributions to continuous optimization in areas such as operations research & bioinformatics. 👏 View the full list of 2024 INFORMS fellows: informs.org/News-Room/INFO…
Important transformation when conic optimization is employed. If you apply it to ||x|| ≤1 you get a quadratic cone.
The perspective transform turns a 1D convex function into a 2D positively homogeneous convex function. Fundamental in convex analysis. At the heart of Cizsar divergences. math.univ-toulouse.fr/Archive-MIP/pu…
Incredibly warm September in Kyiv. It was +28 today. Ukraine is truly beautiful and strong💙💛 Do stand with Ukraine till victory #StandWithUkraine
Find Erling!
Selvom man flytter væk, er hjertet stadig stribet og hjemme på Fyn 💙🤍 Sådan gælder det for over 150 københavnere, der her til aften er samlet i Next House Copenhagen til Stribet i København, hvor vi dyrker det stribede fællesskab 🙌 #obdk #enafstriberne
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