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Minimal Boolean Formulas (2011)

news.ycombinator.com Russ Cox 2025-08-28 02:53:25

Minimal Boolean Formulas Posted on Wednesday, May 18, 2011. 28. That's the minimum number of AND or OR operators you need in order to write any Boolean function of five variables. Alex Healy and I computed that in April 2010. Until then, I believe no one had ever known that little fact. This post describes how we computed it and how we almost got scooped by Knuth's Volume 4A which considers the problem for AND, OR, and XOR. A Naive Brute Force Approach Any Boolean function of two variables ca

Topics: fg function functions size visit

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Harvard hired researcher to uncover slavery ties, fires him for finding slaves

news.ycombinator.com Unknown 2025-08-31 18:24:55

Jordan Lloyd had been praying for something big to happen. The 35-year-old screenwriter was quarantining in her apartment in North Hollywood in June 2020. Without any work projects to fill her days, she picked up the novel Roots, by Alex Haley, to reread. The novel tells the story of Kunta Kinte, Haley’s ancestor, who is captured and sold into slavery in the Gambia and then brought to Virginia, where he is forced to labor on a plantation. It was adapted into an Emmy-award winning television ser

Topics: enslaved harvard people said university

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Minimal Boolean Formulas

news.ycombinator.com Russ Cox 2025-08-29 18:53:25

Minimal Boolean Formulas Posted on Wednesday, May 18, 2011. 28. That's the minimum number of AND or OR operators you need in order to write any Boolean function of five variables. Alex Healy and I computed that in April 2010. Until then, I believe no one had ever known that little fact. This post describes how we computed it and how we almost got scooped by Knuth's Volume 4A which considers the problem for AND, OR, and XOR. A Naive Brute Force Approach Any Boolean function of two variables ca

Topics: fg function functions size visit

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International Nuclear Watchdog Issues Stark Warning in Wake of US Iran Strikes

wired.com Molly Taft 2025-09-02 06:08:54

The head of the International Atomic Energy Agency (IAEA) said in an emergency meeting on Monday that the escalating conflict in Iran “risks collapsing the global nuclear nonproliferation regime” and that if diplomacy is not pursued, “violence and destruction could reach unimaginable levels.” The IAEA, the United Nations’ international nuclear watchdog, convened the emergency meeting following US strikes on three Iranian nuclear sites this weekend. In remarks delivered to the organization’s boa

Topics: grossi iaea iran nuclear sites

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Gov. Greg Abbott vetoes THC ban

news.ycombinator.com Kayla Guo 2025-09-02 09:43:22

This site is protected by reCAPTCHA and the Google and apply.

Topics: apply google protected recaptcha site

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Sailing the fjords like the Vikings yields unexpected insights

arstechnica.com Unknown 2025-09-02 13:52:43

Experimental archaeologist Greer Jarrett of Lund University in Sweden has been sailing in the footsteps of Vikings for the last three years. If you want to learn more about how and where the Vikings sailed, making the journey through the fjords yourself in replica boats is a practical, hands-on approach to achieving that end. Greer Jarrett, an archaeologist at Lund University in Sweden, has spent the last three years doing just that, sailing more than 5,000 kilometers along known Viking trade r

Topics: boats did experimental jarrett university

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This archaeologist built a replica boat to sail like the Vikings

arstechnica.com Unknown 2025-09-02 18:52:43

Experimental archaeologist Greer Jarrett of Lund University in Sweden has been sailing in the footsteps of Vikings for the last three years. If you want to learn more about how and where the Vikings sailed, making the journey through the fjords yourself in replica boats is a practical, hands-on approach to achieving that end. Greer Jarrett, an archaeologist at Lund University in Sweden, has spent the last three years doing just that, sailing more than 5,000 kilometers along known Viking trade r

Topics: boats did experimental jarrett university

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Hawaii Highways

news.ycombinator.com Oscar Voss 2025-09-02 14:55:58

Aloha! Click the dark green buttons on the left for lists of the Interstate, state, and some county highways on the Big Island (Hawaii island), Maui, Lanai and Molokai, Kauai, and Oahu. Go to those lists for detailed information on specific routes, including route numbers, names, termini, mileages, and sometimes historical or other information and/or links to photos and other material elsewhere on this site. Also on the left is a button for detailed guides to Oahu Freeways exits and interchange

Topics: hawaii including information site state

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Scroll snapping, state queries, monster hunter, and gamification

news.ycombinator.com Brecht De Ruyte 2025-08-31 00:21:04

In this (long) part of the customizable select series, it’s all about gamification. In this article, I’d like to highlight one of my demos, where I aimed to recreate a piece of UI found in the Monster Hunter games. To re-create this behavior, I had to think in terms of keyboard navigation first. This demo requires quite a lot of CSS, as well as some scripting, and in the end, I do want to highlight some accessibility concerns. This is an experiment on how far we can take it when styling select e

Topics: event itemlist position scroll select

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CoinMarketCap briefly hacked to drain crypto wallets via fake Web3 popup

bleepingcomputer.com Unknown 2025-09-02 23:47:05

CoinMarketCap, the popular cryptocurrency price tracking site, suffered a website supply chain attack that exposed site visitors to a wallet drainer campaign to steal visitors' crypto. On Friday evening, January 20, CoinMarketCap visitors began seeing Web3 popups asking them to connect their wallets to the site. However, when visitors connected their wallets, a malicious script drained cryptocurrency from them. The company later confirmed threat actors utilized a vulnerability in the site's ho

Topics: attack coinmarketcap malicious site wallet

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P-Hacking in Startups

news.ycombinator.com Lucas Da Costa 2025-08-30 02:56:28

Speed kills rigor. In startups, the pressure to ship fast pushes teams to report anything that looks like an improvement. That’s how p-hacking happens. This piece breaks down three common cases—and how to avoid them. Example 01: Multiple comparisons without correction Imagine you're a product manager trying to optimize your website’s dashboard. Your goal is to increase user signups. Your team designs four different layouts: A, B, C, and D. You run an A/B/n test. Users are randomly assigned to

Topics: 05 95 positive test value

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Cloudflare CEO warns AI crawlers and summaries are eroding the internet's business model

techspot.com Daniel Sims 2025-09-02 19:15:00

In context: Cloudflare CEO Matthew Prince recently reiterated his warning that generative AI crawlers and summaries threaten the foundations of the internet's business model. To protect publishers from a flood of artificial AI traffic that offers virtually no authentic site visits in return, the company is devising methods to combat AI scrapers. Speaking at an Axios event in Cannes last week, Prince explained that search engines and chatbots using generative AI to summarize web content have sig

Topics: ai cloudflare crawlers prince websites

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14 Best Office Chairs of 2025— I've Tested Nearly 60 to Pick Them

wired.com Julian Chokkattu 2025-09-02 18:39:00

Replace Your Casters The wheels on the bottom of your chair are among the easiest parts to replace. If your current casters don't roll smoothly or are too loud, it might be worth replacing them instead of buying a whole new chair. I like these from Stealtho, a Ukrainian company. They'll work with nearly every office chair, though the company notes they don't work with Ikea chairs. The soft polyurethane material means these won't scratch or chip hardwood floors, as some plastic casters do, plus

Topics: chair like seat sitting support

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Report: Apple held internal talks about acquiring AI search startup Perplexity

9to5mac.com Marcus Mendes 2025-09-03 06:46:32

As Apple scrambles to play catch-up in the generative AI race, a new report says the company has considered making its biggest acquisition ever. According to Bloomberg, Apple executives have held internal discussions about a potential bid for Perplexity AI, the fast-growing AI startup known for its conversational web search platform. This would mark Apple’s biggest acquisition ever As reported by Mark Gurman, the talks are still at an early stage and may not result in an actual offer, but the

Topics: acquisition ai apple perplexity search

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Telegram CEO Says He’ll Leave His Fortune to His 106+ Children

gizmodo.com Lucas Ropek 2025-09-03 04:55:17

Telegram CEO Pavel Durov is so obsessed with his own jizz that he’s spent years sending it to random women so they can inseminate themselves with it. As a result, the billionaire is said to have as many as 106 biological children. Now, Durov has promised that—in the event of his death—he will bequeath his massive fortune (reputed to be some $17 billion) to all of his wayward spawn. Durov’s supposed plan was revealed during a recent interview with Le Point, a French news site. He revealed to the

Topics: billionaire children durov said site

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Cloudflare CEO says people aren't checking AI chatbots' source links

engadget.com Unknown 2025-09-04 18:00:16

Companies that develop generative AI always make it a point to say that they include links to websites in the answers that their chatbots generate for users. But Cloudflare CEO Matthew Prince has revealed to Axios that search traffic referrals keep plummeting. Publishers are facing an existential threat, he said, because people aren't clicking through those chatbot links and are relying more and more on AI summaries without digging deeper. Prince told Axios that 10 years ago, Google sent a publ

Topics: ai don pages prince visitor

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Posit floating point numbers: thin triangles and other tricks (2019)

news.ycombinator.com Marc B. Reynolds 2025-09-06 18:42:03

WARNING: Some numerical analysis and mathematics will be mentioned in passing. Also the number systems will not be treated like black-boxes. Risk of physical injury, however, is negligible. I like magic tricks. Watching the performer do the show and attempting to catch the “slight-of-hand” that makes the impossible seem possible. It’s fun and makes me believe in magic for a few moments. So I’m going to give a shot at doing some floating point magic tricks. Throughout my performance I’ll use

Topics: ieee left posits right text

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Facebook's new passkey support could soon let you ditch your password forever

zdnet.com Lance Whitney 2025-09-06 22:51:00

NurPhoto / Contributor/Getty For all of us who hate passwords, passkeys represent a simpler and safer way of authenticating online accounts. But adoption has been slow, with many companies and websites still relying on passwords. Now the world's biggest social media platform is jumping on the bandwagon. On Wednesday, Facebook announced that it's now rolling out support for passkeys on mobile devices. This means you'll be able to use one to sign in to Facebook on an iPhone or Android device. Bu

Topics: facebook passkey passkeys passwords website

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DuckDuckGo scam blocker detects fake stores, crypto sites, virus alerts, more

9to5mac.com Ben Lovejoy 2025-09-07 02:44:14

The privacy-focused web browser DuckDuckGo has boosted its anti-scam features. It can now detect and block fake ecommerce stores, crypto sites, virus alerts, and more. The new security feature is completely free for all users on both Mac and iOS browsers, with no Privacy Pro subscription needed … DuckDuckGo already had the ability to detect common phishing and malware attacks, as well as malicious ads, but these features have now been boosted and branded as Scam Blocker. There are the two new

Topics: malware personal phishing scam sites

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Facebook's new passkey support could let you ditch your password once and for all

zdnet.com Lance Whitney 2025-09-07 12:30:18

NurPhoto / Contributor/Getty For all of us who hate passwords, passkeys represent a simpler and safer way of authenticating online accounts. But adoption has been slow, with many companies and websites still relying on passwords. Now the world's biggest social media platform is jumping on the bandwagon. On Wednesday, Facebook announced that it will soon support passkeys on mobile devices. This means you'll be able to use one to sign in to Facebook on an iPhone or Android device. But the passke

Topics: facebook passkey passkeys passwords website

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SpaceX Starship explodes again, this time on the ground

theverge.com Richard Lawler 2025-09-07 11:03:34

On Wednesday, June 18 at approximately 11 p.m. CT, the Starship preparing for the tenth flight test experienced a major anomaly while on a test stand at Starbase. A safety clear area around the site was maintained throughout the operation and all personnel are safe and accounted for. Our Starbase team is actively working to safe the test site and the immediate surrounding area in conjunction with local officials. There are no hazards to residents in surrounding communities, and we ask that indi

Topics: area safe site starbase test

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AutoMix on iOS 26 is going viral. Here's how to try the hottest iPhone feature yourself

zdnet.com Sabrina Ortiz 2025-09-08 02:52:00

Sabrina Ortiz/ZDNET Apple Music users have often watched Spotify take the lead when it comes to innovative features and personalized listening experiences. But with the introduction of the new AutoMix feature, Apple Music may finally be closing the gap -- and even setting a new standard of its own. Also: How to install iOS 26 beta on your iPhone (and which models support it) What is AutoMix in Apple Music? At Apple's Worldwide Developer Conference (WWDC) last week, the company unveiled upgra

Topics: apple automix feature music transitions

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Via the False Claims Act, NIH puts universities on edge

arstechnica.com Unknown 2025-09-08 14:42:07

Earlier this year, a biomedical researcher at the University of Michigan received an update from the National Institutes of Health. The federal agency, which funds a large swath of the country’s medical science, had given the green light to begin releasing funding for the upcoming year on the researcher’s multi-year grant. Not long after, the researcher learned that the university had placed the grant on hold. The school’s lawyers, it turned out, were wrestling with a difficult question: whethe

Topics: funding grant nih researcher university

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Leica is launching its own 35mm film

theverge.com Dominic Preston 2025-09-09 06:43:20

is a news editor with over a decade’s experience in journalism. He previously worked at Android Police and Tech Advisor. Leica has announced the first 35mm film produced under its own name, Monopan 50. It’s an ultra-fine grain black-and-white film, and will cost $10 per 36-exposure roll when it goes on sale on August 21st. Leica says that the new film is produced in Germany, though wouldn’t name a manufacturer when asked. The specs, right down to every curve of the spectral sensitivity chart,

Topics: 50 film leica monopan sensitivity

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The Travel Writer's Dilemma: Share, or Gatekeep?

news.ycombinator.com Pico Iyer 2025-09-06 16:14:22

No reviewer of books or movies faces this predicament, and if an overlooked novel or documentary suddenly wins recognition, most of us rejoice. But destinations are fragile, on several fronts — many can’t bear the weight of thousands. While sailing around Antarctica, even as I marveled at its otherworldly beauty, I was selfishly glad that not many visitors are permitted there, so precarious is its environment. Sometimes, therefore, I simply delight in the fact that my tastes are not the same as

Topics: desert fact monks path visitors

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JPMorgan moves further into crypto with stablecoin-like token JPMD

cnbc.com Ryan Browne 2025-09-10 14:21:31

Jamie Dimon, Chairman and CEO of JPMorgan Chase & Co., speaks to the Economic Club of New York in Manhattan, New York City, on April 23, 2024. JPMorgan Chase is taking a step further into the cryptocurrency space with its own stablecoin-like token, called JPMD. The U.S. banking giant told CNBC on Tuesday that it's planning to launch a so-called deposit token on Coinbase's public blockchain Base, which is built on top of the Ethereum network. Each deposit token is meant to serve as a digital re

Topics: called deposit jpmd jpmorgan token

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Sitecore CMS exploit chain starts with hardcoded 'b' password

bleepingcomputer.com Unknown 2025-09-11 06:10:35

A chain of Sitecore Experience Platform (XP) vulnerabilities allows attackers to perform remote code execution (RCE) without authentication to breach and hijack servers. Sitecore is a popular enterprise CMS used by businesses to create and manage content across websites and digital media. Discovered by watchTowr researchers, the pre-auth RCE chain disclosed today consists of three distinct vulnerabilities. It hinges on the presence of an internal user (sitecore\ServicesAPI) with a hardcoded pa

Topics: attacker path sitecore upload watchtowr

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Commuters in South Korea will soon be able to pay fares using Apple Pay

9to5mac.com Marcus Mendes 2025-09-12 10:38:43

More than two years after landing in South Korea, Apple Pay is about to fill one of its biggest gaps in the country: public transportation support. However, the win might be short-lived. Here’s why. Transit card provider Tmoney confirmed Monday that its system will soon work with both iPhones and Apple Watches. Once live, users will be able to tap to pay for subway and bus rides across the country. As observed by Korea JoongAng Daily (via Reddit), there’s no official launch date just yet, but

Topics: apple korea pay tmoney transit

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9 Urgent Questions About Trump Mobile and the Gold T1 Smartphone

wired.com Brian Barrett 2025-09-12 17:54:05

On Monday morning, the Trump Organization announced that it would soon offer a new wireless service, Trump Mobile, and a golden, $499 smartphone to go with it. None of it makes much sense. To be clear, the Trumps would be far from the only celebrities to moonlight as mobile virtual network operator, or MVNO, a pretty common practice where small carriers piggyback off of bigger networks under a different name. Even the SmartLess podcast guys have one. But the more you read about Trump’s cell pla

Topics: mobile smartphone t1 trump website

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PC modding repository Nexus Mods has a new owner

theverge.com Jay Peters 2025-09-12 18:04:40

is a news editor covering technology, gaming, and more. He joined The Verge in 2019 after nearly two years at Techmeme. Nexus Mods, a website known for hosting mods for thousands of PC games, has been handed over to new ownership, according to former owner Robin “Dark0ne” Scott. “After months of meetings, face-to-face talks, and a whole lot of soul searching, I am thrilled to say that I truly believe I have found the exact right people for the task,” Scott says in a post published on Monday.

Topics: didn new says scott site

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Latest Tech News

Minimal Boolean Formulas (2011)

Harvard hired researcher to uncover slavery ties, fires him for finding slaves

Minimal Boolean Formulas

International Nuclear Watchdog Issues Stark Warning in Wake of US Iran Strikes

Gov. Greg Abbott vetoes THC ban

Sailing the fjords like the Vikings yields unexpected insights

This archaeologist built a replica boat to sail like the Vikings

Hawaii Highways

Scroll snapping, state queries, monster hunter, and gamification

CoinMarketCap briefly hacked to drain crypto wallets via fake Web3 popup

P-Hacking in Startups

Cloudflare CEO warns AI crawlers and summaries are eroding the internet's business model

14 Best Office Chairs of 2025— I've Tested Nearly 60 to Pick Them

Report: Apple held internal talks about acquiring AI search startup Perplexity

Telegram CEO Says He’ll Leave His Fortune to His 106+ Children

Cloudflare CEO says people aren't checking AI chatbots' source links

Posit floating point numbers: thin triangles and other tricks (2019)

Facebook's new passkey support could soon let you ditch your password forever

DuckDuckGo scam blocker detects fake stores, crypto sites, virus alerts, more

Facebook's new passkey support could let you ditch your password once and for all

SpaceX Starship explodes again, this time on the ground

AutoMix on iOS 26 is going viral. Here's how to try the hottest iPhone feature yourself

Via the False Claims Act, NIH puts universities on edge

Leica is launching its own 35mm film

The Travel Writer's Dilemma: Share, or Gatekeep?

JPMorgan moves further into crypto with stablecoin-like token JPMD

Sitecore CMS exploit chain starts with hardcoded 'b' password

Commuters in South Korea will soon be able to pay fares using Apple Pay

9 Urgent Questions About Trump Mobile and the Gold T1 Smartphone

PC modding repository Nexus Mods has a new owner

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