Erling D. Andersen
@primaldual.bsky.social
I spend most of my adult life on convex optimization and www.Mosek.com. In my spare time I like riding my racing bike and follow www.ob.dk.
ORCID: https://orcid.org/0000-0001-6351-8761
ORCID: https://orcid.org/0000-0001-6351-8761
Reposted by Erling D. Andersen
I with the PSF.
The Python Software Foundation was recommended for a $1.5M grant from the National Science Foundation. The terms of the award said PSF could not work on DEI, whether or not the grant funding was used for it.
PSF therefore declined the funding.
Science suffers, but commitment to core values remains
PSF therefore declined the funding.
Science suffers, but commitment to core values remains
TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-...
🧵
🧵
October 28, 2025 at 5:14 AM
I with the PSF.
Interesting work on closing the gap between theory and practice of the simplex algorithm.
The simplex algorithm is super efficient. 80 years of experience says it runs in linear time. Nobody can explain _why_ it is so fast.
We invented a new algorithm analysis framework to find out.
We invented a new algorithm analysis framework to find out.
Beyond Smoothed Analysis: Analyzing the Simplex Method by the Book
Narrowing the gap between theory and practice is a longstanding goal of the algorithm analysis community. To further progress our understanding of how algorithms work in practice, we propose a new alg...
arxiv.org
October 28, 2025 at 5:11 AM
Interesting work on closing the gap between theory and practice of the simplex algorithm.
Ad expected then Putin makes Trump look like a fool.
October 22, 2025 at 6:06 AM
Ad expected then Putin makes Trump look like a fool.
Reposted by Erling D. Andersen
Thank you, Denmark and Norway! 🇺🇦🇩🇰🇳🇴
The Danish government is allocating DKK 1.1 billion ($171,5 million) in military aid for Ukraine, focused on training and maritime security, the country's defence ministry said⤵️
The Danish government is allocating DKK 1.1 billion ($171,5 million) in military aid for Ukraine, focused on training and maritime security, the country's defence ministry said⤵️
October 16, 2025 at 7:46 AM
Thank you, Denmark and Norway! 🇺🇦🇩🇰🇳🇴
The Danish government is allocating DKK 1.1 billion ($171,5 million) in military aid for Ukraine, focused on training and maritime security, the country's defence ministry said⤵️
The Danish government is allocating DKK 1.1 billion ($171,5 million) in military aid for Ukraine, focused on training and maritime security, the country's defence ministry said⤵️
@sophie.huiberts.me is featured in a Quanta magazine article about the simplex method.
www.quantamagazine.org/researchers-...
www.quantamagazine.org/researchers-...
Researchers Discover the Optimal Way To Optimize | Quanta Magazine
The leading approach to the simplex method, a widely used technique for balancing complex logistical constraints, can’t get any better.
www.quantamagazine.org
October 15, 2025 at 7:28 AM
@sophie.huiberts.me is featured in a Quanta magazine article about the simplex method.
www.quantamagazine.org/researchers-...
www.quantamagazine.org/researchers-...
Reposted by Erling D. Andersen
October 9, 2025 at 4:14 AM
I wish I could write like Beth.
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
October 7, 2025 at 4:43 PM
I wish I could write like Beth.
Some news about active set methods.
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
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
October 3, 2025 at 7:07 PM
Some news about active set methods.
For the second time in my life I am witnessing imperial decline.
👇
With his fixation on the Western Hemisphere, Trump is committing "superpower suicide"...
GIFT LINK: bloom.bg/46vzdnO
@opinion.bloomberg.com
GIFT LINK: bloom.bg/46vzdnO
@opinion.bloomberg.com
October 2, 2025 at 10:39 AM
For the second time in my life I am witnessing imperial decline.
Reposted by Erling D. Andersen
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!
Og gæt hvem der betaler regningen!?
Rigtig gættet. Det gør du og landets vandforbrugets, som skal betale milliarder til rensning af vandet.
Skål!
October 1, 2025 at 6:50 PM
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!
Og gæt hvem der betaler regningen!?
Rigtig gættet. Det gør du og landets vandforbrugets, som skal betale milliarder til rensning af vandet.
Skål!
Maybe Denmark should be inspired by Latvia.
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...
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
September 25, 2025 at 5:06 PM
Maybe Denmark should be inspired by Latvia.
Reposted by Erling D. Andersen
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. 🔇
September 18, 2025 at 4:11 PM
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. 🔇
Reposted by Erling D. Andersen
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.
September 18, 2025 at 8:12 AM
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.
The way to go.
EU proposes to build an anti-drone wall, together with the Ukrainians
on.ft.com/4gBnOX2 via @FT
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
September 17, 2025 at 11:34 AM
The way to go.
Reposted by Erling D. Andersen
its wild how slippery objective consensus reality is right now
September 13, 2025 at 10:08 PM
its wild how slippery objective consensus reality is right now
Reposted by Erling D. Andersen
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
September 4, 2025 at 3:01 PM
It’s a shame no one had the power to bar Trump from office four years ago www.theguardian.com/us-news/2025...
Reposted by Erling D. Andersen
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
I vaguely remember tweeting something like the country that effectively captures this free energy source at scale will rule the 21st century. whelp.
August 30, 2025 at 2:59 AM
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
Reposted by Erling D. Andersen
Waning days of a dying empire
Is this what collapse looks like from the inside?
www.slowboring.com
August 29, 2025 at 1:32 AM
Reposted by Erling D. Andersen
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.
August 27, 2025 at 3:28 PM
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.
Ignoring the EV evolution is likely to be a bad idea.
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
https://theatln.tc/16qiPopQ
August 18, 2025 at 6:10 AM
Ignoring the EV evolution is likely to be a bad idea.
Reposted by Erling D. Andersen
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
August 1, 2025 at 1:45 AM
The rapid decline of American science has few precedents in history, argues @rossandersen.bsky.social. We are witnessing an unparalleled act of self-sabotage:
Relying on Energy import Russia was stupid. Relying on Energy import from Trumps US is close to be equally bad.
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
July 31, 2025 at 6:27 AM
Relying on Energy import Russia was stupid. Relying on Energy import from Trumps US is close to be equally bad.
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/...
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
July 31, 2025 at 5:38 AM
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/...
creators.spotify.com/pod/profile/...
For more interesting OR podcasts see
creators.spotify.com/pod/profile/...