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Reposted by Erling D. Andersen

arxiv math.OC @arxiv-math-oc.bsky.social · 7h

Frank Vallentin
Conic optimization for extremal geometry
https://arxiv.org/abs/2510.06960

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Erling D. Andersen @primaldual.bsky.social · 1d

I wish I could write like Beth.

The Atlantic @theatlantic.com · 1d

For working-class kids, the path to the middle class Is vanishing. Returning to my Ohio hometown showed me why, Beth Macy writes.

What Happened to My Hometown?

The fraying of my family and the Ohio we once knew

bit.ly

Erling D. Andersen @primaldual.bsky.social · 5d

Some news about active set methods.

Sophie Huiberts @sophie.huiberts.me · 5d

SODA notifications are in the inboxes, and this paper will be in the conference :)

This is my second paper using extended formulations to prove running time lower bounds. I am surprised that people have been sleeping on this angle, but happy to fill in the gap where needed

An unconditional lower bound for the active-set method in convex quadratic maximization

We prove that the active-set method needs an exponential number of iterations in the worst-case to maximize a convex quadratic function subject to linear constraints, regardless of the pivot rule used...

arxiv.org

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Erling D. Andersen @primaldual.bsky.social · 7d

For the second time in my life I am witnessing imperial decline.

Molly McKew @mollymckew.bsky.social · 7d

👇

andreaskluth.bsky.social @andreaskluth.bsky.social · 7d

With his fixation on the Western Hemisphere, Trump is committing "superpower suicide"...

GIFT LINK: bloom.bg/46vzdnO

@opinion.bloomberg.com

Reposted by Erling D. Andersen

Emil Nielsen @emilnielsen.bsky.social · 7d

Nye afsløringer. Regeringen lader landbruget forurene dit drikkevand uden at gribe ind.

Og gæt hvem der betaler regningen!?

Rigtig gættet. Det gør du og landets vandforbrugets, som skal betale milliarder til rensning af vandet.

Skål!

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Erling D. Andersen @primaldual.bsky.social · 13d

Maybe Denmark should be inspired by Latvia.

Sven-Erik Volberg @volberg.bsky.social · 13d

Rheinmetall is building another 155mm factory - this time in Latvia. MoU signed today. Production facility including shell forging & filling line. Construction scheduled spring/2026. €275 million investment for a 5-figure production capacity. Where's ours 🇪🇪?

www.rheinmetall.com/en/media/new...

Latvia orders ammunition factory from Rheinmetall

Rheinmetall is building a modern 155mm artillery ammunition production plant in Latvia. A joint venture with the State Defence Corporation will operate the plant.

www.rheinmetall.com

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Thomas Steinke @stein.ke · 20d

Apps need to ask for permission to access the camera/microphone. The same should apply to the speaker. Some apps should never make a sound. 🔇

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Jo Kershaw @mthrjo.bsky.social · 21d

Re that last repost (from @davidallengreen.bsky.social) - I’ve been reflecting lately that the stuff we did in History at school on the weaknesses of the Weimar Constitution missed the real point. It had its flaws, but the real problem was a lack of will to defend democracy and the rule of law.

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Erling D. Andersen @primaldual.bsky.social · 22d

The way to go.

Anne Applebaum @anneapplebaum.bsky.social · 22d

EU proposes to build an anti-drone wall, together with the Ukrainians
on.ft.com/4gBnOX2 via @FT

Europe turns to Ukrainian tech for ‘drone wall’ against Russia

Billions available for governments to purchase battle-tested technology to fill Nato’s security gap, says Brussels

on.ft.com

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Reposted by Erling D. Andersen

🐔 Brian Bucklew 🐔 ₑͤ＞∿＜ₑͤ ∞🌮 @unormal.bsky.social · 25d

its wild how slippery objective consensus reality is right now

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Adam Gurri @adamgurri.liberalcurrents.com · Sep 4

It’s a shame no one had the power to bar Trump from office four years ago www.theguardian.com/us-news/2025...

Trump’s second presidency is ‘most dangerous period’ since second world war, Mitch McConnell says

Former Senate leader likens administration’s fixation with tariffs to isolationist policies of the US in the 1930s

www.theguardian.com

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Don Moynihan @donmoyn.bsky.social · Aug 30

At some point in the not too distant future the conventional wisdom will be that this was a period where the US focused on dumb shit while China took the lead in multiple domains

Patrick Kennedy [Undo Damage] @humanecosystem.bsky.social · Aug 29

I vaguely remember tweeting something like the country that effectively captures this free energy source at scale will rule the 21st century. whelp.

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Matthew Yglesias @mattyglesias.bsky.social · Aug 29

Is this the end?

www.slowboring.com/p/waning-day...

Waning days of a dying empire

Is this what collapse looks like from the inside?

www.slowboring.com

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Phillips OBrien @phillipspobrien.bsky.social · Aug 27

So today we had confirmation that the US is now actively trying to take territory from Denmark, a democratic ally in one case, and in another case give land from democratic Ukraine to dictatorial Russia.

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Erling D. Andersen @primaldual.bsky.social · Aug 18

Ignoring the EV evolution is likely to be a bad idea.

The Atlantic @theatlantic.com · Aug 18

To compete with China’s cheap electric cars, Ford is retooling the assembly line—the very thing Henry Ford used to get the world motoring a century ago, Patrick George reports. Even that might not be enough.
https://theatln.tc/16qiPopQ

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The Atlantic @theatlantic.com · Aug 1

The rapid decline of American science has few precedents in history, argues @rossandersen.bsky.social. We are witnessing an unparalleled act of self-sabotage:

How Scientific Empires End

And what it means for America

bit.ly

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Erling D. Andersen @primaldual.bsky.social · Jul 31

Relying on Energy import Russia was stupid. Relying on Energy import from Trumps US is close to be equally bad.

George Monbiot @georgemonbiot.bsky.social · Jul 31

1. A characteristically brilliant explanation by @billmckibben.bsky.social of why Trump's attempt to force the EU to buy US fossil gas (please let's stop calling it "natural gas") will fail. Unfortunately, the UK is now locked into US gas dependence. 🧵 billmckibben.substack.com/p/how-the-gr...

How the Grift Works

Trump pulls off a nasty con--and maybe he gets rolled too

billmckibben.substack.com

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Erling D. Andersen @primaldual.bsky.social · Jul 31

Breaking! Now there is a podcast with me about my professional life.

creators.spotify.com/pod/profile/...

For more interesting OR podcasts see

creators.spotify.com/pod/profile/...

Subject to • A podcast on Spotify for Creators

"Subject to" offers a series of informal conversations with relevant figures in the fields of Operations Research, Combinatorial Optimization and Logistics, and they are hosted by Anand Subramanian, a...

creators.spotify.com

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Andrew Lawrence @ndrew.bsky.social · Jul 22

we are currently watching an entire political party run cover for the most notorious sex trafficking ring in modern human history

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Anders Puck Nielsen @anderspucknielsen.dk · Jul 7

If Donald Trump wanted to give Russia a helping hand with their summer offensive, it would look exactly like what we are seeing. That is my point in this video, where I also discuss the air war and give a status on the frontline situation. #Ukraine

War update – Is Trump helping Russia now?

YouTube video by Anders Puck Nielsen

www.youtube.com

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Erling D. Andersen @primaldual.bsky.social · Jun 27

Congratulations.

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Felix Drost @felixdrost.bsky.social · Jun 22

Ukrainian security from Russian assault is by far the most vital European "national" security concern.

That we aren't prepared to enforce red lines vs Russia is carte blanche for them to undermine security and stability especially by meddling in our politics and (social) media.

Phillips OBrien @phillipspobrien.bsky.social · Jun 22

Hello all, just released my free weekend update. It’s partly an appeal not to stop focussing on Ukraine with the Israel (US)-Iran air war raging. Ukraine is still fighting hard, Putin has restated his maximalist demands, Ukraine has viable strategic options… open.substack.com/pub/phillips...

Weekend Update #138: Do Not Forget About Ukraine

Putin Restates Maximalist Demands; A Ukrainian Victory Strategy; The Russian Summer Offensive: The Real Center Of Gravity?

open.substack.com

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Ben Recht @beenwrekt.bsky.social · Jun 11

RIP Brian Wilson.

I Just Wasn't Made For These Times

YouTube video by The Beach Boys - Topic

www.youtube.com

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Phillips OBrien @phillipspobrien.bsky.social · May 26

Don't be fooled by any of Trump's performative BS. Unless he actually pushes for sanctions, this is the crocodile tears of a narcissistic sociopath. Also, note that he blames Zelensky as much as Putin for the war--those bad Ukrainians, asking to be invaded!

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Anders Puck Nielsen @anderspucknielsen.dk · May 24

We need to consider Putin's ideological reasons for fighting in Ukraine if we want to understand why he is so reluctant to engage in peace negotiations. That is my topic in this video.

Why Putin believes the war is defensive

YouTube video by Anders Puck Nielsen

youtu.be

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