What is Hackers' Pub?

Hackers' Pub is a place for software engineers to share their knowledge and experience with each other. It's also an ActivityPub-enabled social network, so you can follow your favorite hackers in the fediverse and get their latest posts in your feed.

José A. Alonso @Jose_A_Alonso@mathstodon.xyz
Public

Duality theory in linear optimization and its extensions - formally verified. ~ Martin Dvorak, Vladimir Kolmogorov. afm.episciences.org/17678

Duality theory in linear optimization and its extensions -- formally verified

Vladimir Kolmogorov · Farkas established that a system of linear inequalities has a solution if and only if we cannot obtain a contradiction by taking a linear combination of the inequalities. We state and formally prove several Farkas-like theorems over linearly ordered fields in Lean 4. Furthermore, we extend duality theory to the case when some coefficients are allowed to take "infinite values".

afm.episciences.org · Episciences

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Glyph @glyph@mastodon.social
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More generally I am deeply suspicious of any thinking which is rooted in, "I, with my high intellect, sophisticated approach to problems, and vaguely exceptional vibe, am inherently superior to others and thus more capable of avoiding a risk while engaging in the same activity". The people most vulnerable to propaganda are those who believe they are too smart to fall for it, and it stands to reason that those who *believe* that they can use AI well are also at risk for pathological outcomes.

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Bumble @bumble@ibe.social
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Hi

I'm trying to help a friend out with his Mastodon instance. An upgrade went badly wrong and mastodon would not restart.

We've rebuilt the server using backups and the server is up and running. It is federating. However no one can login.

If I enable debugging log i get the following for a log attempt in the system logs

Errno::ECONNREFUSED (Connection refused - connect(2) for 127.0.0.1:389):
Mar 14 18:47:50 debian-s2-2 bundle[13675]: [0e4f20e2-6069-47ee-8678-e4db5247e075]
Mar 14 18:47:50 debian-s2-2 bundle[13675]: [0e4f20e2-6069-47ee-8678-e4db5247e075] app/models/concerns/user/ldap_authenticable.rb:11:in 'User::LdapAuthenticable::ClassMethods#authenticate_with_ldap'
Mar 14 18:47:50 debian-s2-2 bundle[13675]: [0e4f20e2-6069-47ee-8678-e4db5247e075] app/controllers/auth/sessions_controller.rb:69:in 'Auth::SessionsController#find_user_from_params'
Mar 14 18:47:50 debian-s2-2 bundle[13675]: [0e4f20e2-6069-47ee-8678-e4db5247e075] app/controllers/auth/sessions_controller.rb:62:in 'Auth::SessionsController#find_user'
Mar 14 18:47:50 debian-s2-2 bundle[13675]: [0e4f20e2-6069-47ee-8678-e4db5247e075] app/controllers/concerns/auth/two_factor_authentication_concern.rb:12:in 'Auth::TwoFactorAuthenticationConcern#two_factor_enabled?'
Mar 14 18:47:50 debian-s2-2 bundle[13675]: [0e4f20e2-6069-47ee-8678-e4db5247e075] lib/mastodon/middleware/socket_cleanup.rb:11:in 'Mastodon::Middleware::SocketCleanup#call'

API calls are working. Just the Web logins that are failing.

Any help much appreciated

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Alex R :heart_progress: @alex@tech.lgbt
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'Oh, he's not normally like that', you say, as your red-eyed miniature hellhound attempts to take a chunk out of my ankles in a manner that suggests he is, in fact, deeply accustomed to the taste of human flesh

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José A. Alonso @Jose_A_Alonso@mathstodon.xyz
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A formalization of Borel determinacy in Lean. ~ Sven Manthe. afm.episciences.org/17712

A formalization of Borel determinacy in Lean

Sven Manthe · We present a formalization of Borel determinacy in the Lean 4 theorem prover. The formalization includes a definition of Gale-Stewart games and a proof of Martin's theorem stating that Borel games are determined. The proof closely follows Martin's "A purely inductive proof of Borel determinacy".

afm.episciences.org · Episciences

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Misty @misty@digipres.club
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You might remember from my IGF list I was talking about the wildly experimental language game Kevin's Playing in Berlin. Well, it's out now! You owe yourself to look at this. store.steampowered.com/app/398

kevin's PLAYING in berlin on Steam

Release the author, who is nothing but the player. Release the player, and restore the freedom once taken away. A three-game experiment in what it means to play.

store.steampowered.com

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Evan Hahn @EvanHahn@bigshoulders.city
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"human.json is a protocol for humans to assert authorship of their site content and vouch for the humanity of others. It uses URL ownership as identity, and trust propagates through a crawlable web of vouches between sites." I've added it to my website! codeberg.org/robida/human.json

Summary card of repository robida/human.json, described as: A lightweight protocol for humans to assert authorship of their website content and vouch for the humanity of others.

human.json

A lightweight protocol for humans to assert authorship of their website content and vouch for the humanity of others.

codeberg.org · Codeberg.org

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Electronic Frontier Foundation @eff@mastodon.social
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When lawmakers and advocacy groups frame queer existence itself as a threat to young people, age-verification laws become ideological enforcement instead of regulatory policy. eff.org/deeplinks/2026/03/rep-

Rep. Finke Was Right: Age-Gating Isn’t About Kids, It’s About Control

What’s at stake is whether “protecting children” becomes a legal pretext for embedding government control over the internet to enforce specific moral and religious judgments—judgments that deny marginalized people access to speech, community, history, and truth—into law.

www.eff.org · Electronic Frontier Foundation

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Anthropy :verified_dragon: @anthropy@mastodon.derg.nz
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Shared by Cat 🐈🥗 (D.Burch) :paw:⁠:paw:

I still can't even that my now nearly 80 year old mom has been on Fedora on a thinkpad e520 (2011) for a decade and it all just works.

I checked her laptop just now and it's fully up to date on fedora 43, so she's done like 20 version upgrades autonomously too. The battery has degraded a little but the whole thing still works fine and she's very happy with it.

This is how things should be, this is peak computing tbh.

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Glyph @glyph@mastodon.social
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RE: mastodon.social/@glyph/1162203

Since I've gotten this feedback a couple times, I want to address it:

I know Cory is writing about *his specific* colleagues who he believes are using AI successfully, not devs in general, whose problems he has already implicitly acknowledged; I've moved the goalposts back to "developers in general".

That is, technically, an accurate description of what I did, but in the next post down in the thread, I explained *why*: I don't think his friends are special any more than mine are.

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Alexandre Mutel @xoofx@mastodon.social
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What's your favorite AI Coding agent CLI/GUI that can use Codex / Copilot subscriptions?

* Codex is pretty bad from my experience
* Copilot is quite better
* OpenCode I haven't tried recently but I have heard good things.
* Squad, quite good, from a multi-agent perspective, used at work, haven't setup it at home

Any others that you would recommend?

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mcc @mcc@mastodon.social
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What I'm listening to today: "The Party Don't Stop", Mia X

This is it: The greatest track No Limit ever created. Their in-house production shop ("Beats by the Pound") as their name implies were all about *quantity*, but when they cared they could deliver pure gold, deliciously cheesy like those cover photoshops. This track is perfect, a joyous block party. And Foxy Brown's here, because like, OK, it's 1997, something incredible is happening, of course Foxy Brown's here.

youtube.com/watch?v=gD00hgwbpac

The Party Don't Stop

Provided to YouTube by Universal Music GroupThe Party Don't Stop · Mia xUnlady Like℗ 1997 Priority Records, LLCReleased on: 1997-01-01Producer: Craig B For B...

www.youtube.com · YouTube

mcc @mcc@mastodon.social
Public
Shared by mcc

What I'm listening to today: "The Man Right Chea", Mystikal

Yes, my 90s southern hip hop mixtape is 50% No Limit by volume. Here's the thing: So was the radio in 1997. This is a loopy, hypnotic bit of experimental techno packaged as hip hop and I'm still kinda shocked radio stations played it

Beats by the Pound getting the most technique out of the cheapest synthesizers; Mystikal doing oddly experimental vocals that seem to have departed "rap" and approach skat singing

youtube.com/watch?v=iEQJZ8Ccpqc

Mystikal - The Man Right Chea

The Man Right Chea by New Orleans rapper Mystikal From the album Unpredictable © 1997 Jive Records#Mystikal

www.youtube.com · YouTube

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Manuela Malasaña @Xibanya@mastodon.xyz
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Shared by Gabriele Svelto

I read an interesting anecdote: Gershwin asked Ravel to mentor him. Ravel considered it carefully then declined, not because he felt Gershwin wasn't worthy of him or that he had nothing to teach Gershwin, but because he liked Gershwin's style and he was worried that if he mentored Gershwin he'd infect it with his Ravelisms

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