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Discrete Structures [pdf]

https://kyleormsby.github.io/files/113spring26/113full_text.pdf
1•mathgenius•12s ago•0 comments

Godot maintainers struggle with 'demoralizing' AI slop PRs

https://www.theregister.com/2026/02/18/godot_maintainers_struggle_with_draining/
1•beardyw•27s ago•0 comments

I built 3 websites with Claude Code in 6 hours. Git is still the wall

https://www.streaming-radar.com/p/who-needs-squarespace-anymorehttps://www.streaming-radar.com/p/...
1•lbostral•43s ago•0 comments

Show HN: Free AI math solver with step-by-step explanations (no paywall)

https://www.quizwhiz.ai/tools/math-solver/
1•sunnyville•1m ago•0 comments

AI harness for PG –> CH migrations

https://clickhouse.com/blog/ai-powered-migraiton-from-postgres-to-clickhouse-with-fiveonefour
1•oatsandsugar•3m ago•0 comments

Portabase 1.2.7: Large database backup support, UI/UX improvements

2•rambokdev•5m ago•1 comments

Writes and Write-Nots

https://paulgraham.com/writes.html
2•supriyo-biswas•6m ago•0 comments

Computronium

https://en.wikipedia.org/wiki/Computronium
2•dvrp•6m ago•0 comments

Phoenix pay system fiasco: 10 years of mistakes and lessons

https://www.cbc.ca/news/canada/ottawa/federal-phoenix-pay-system-10-year-anniversary-9.7093933
3•Teever•8m ago•0 comments

Microsoft's new 10k-year data storage medium: glass

https://arstechnica.com/science/2026/02/microsofts-new-10000-year-data-storage-medium-glass/
3•danousna•9m ago•0 comments

A benchmark for vericoding: formally verified program synthesis

https://arxiv.org/abs/2509.22908
1•luskira•10m ago•0 comments

Show HN: CogmemAi – Persistent Memory for Claude Code via MCP

https://github.com/hifriendbot/cogmemai-mcp
1•hifriendbot•10m ago•0 comments

Debit, Charge, or Credit: Which Card Program Is Right for Your Business?

https://www.synctera.com/post/debit-charge-or-credit-which-card-program-is-right-for-your-business
2•thatdrew•11m ago•0 comments

Show HN: Syncpack v14, Monorepo CLI tool

https://syncpack.dev/
2•fold_left•11m ago•0 comments

Ex-DeepMind's David Silver Eyes $1B Fundraise for Ineffable Intelligence

https://techfundingnews.com/ex-deepmind-ai-researcher-eyes-1b-fundraise-for-london-based-ineffabl...
1•chrisloy•12m ago•0 comments

Popcorn Time R3 – The Reboot on Ethereum

https://bitcoin-zero-down-2ea152.gitlab.io/gallery/gallery-item-neg-863/
2•machardmachard•12m ago•1 comments

The Transcritical CO2 Cycle: Promise, Pitfalls, and Prospects

https://www.mdpi.com/1996-1073/19/3/585
1•PaulHoule•13m ago•0 comments

Thunderbolt 4 on PC NVM firmware update from Intel breaks compatibility

https://asusproart.medium.com/thunderbolt-on-pc-is-a-nightmare-of-intels-own-making-edd3141cc03f
2•ibobev•13m ago•0 comments

The Philosopher's Elevator

https://practicalradicalism.substack.com/p/the-philosophers-elevator
2•paulpauper•14m ago•0 comments

Texas Sues TP-Link over 'Web of Deception' About Alleged China Ties

https://www.pcmag.com/news/texas-sues-tp-link-over-web-of-deception-about-alleged-china-ties?test...
2•speckx•14m ago•0 comments

Show HN: See – searchable JSON compression, smaller than ZSTD (on our data)

https://github.com/kodomonocch1/see_proto
1•Tetsuro•14m ago•1 comments

Claude is dropping max plans for enterprise (maybe for everyone?)

https://old.reddit.com/r/ClaudeCode/comments/1r82req/claude_is_dropping_max_plans_for_enterprise_...
2•agentifysh•14m ago•0 comments

Show HN: I analyzed 157K HN posts and built skills with guardrails against BS

https://github.com/JanBussieck/hn-skill
1•buss_jan•14m ago•0 comments

99% of adults over 40 have shoulder "abnormalities" on an MRI, study finds

https://arstechnica.com/health/2026/02/99-of-adults-over-40-have-shoulder-abnormalities-on-an-mri...
3•rbanffy•14m ago•0 comments

Clinejection: Compromising Cline's prod releases by prompting the issue triager

https://adnanthekhan.com/posts/clinejection/
1•hrpnk•15m ago•1 comments

Custom Kernels for All from Codex and Claude

https://huggingface.co/blog/custom-cuda-kernels-agent-skills
2•ibobev•16m ago•0 comments

The Cassidy Report on the FDA

https://marginalrevolution.com/marginalrevolution/2026/02/the-cassidy-report-on-the-fda.html
2•paulpauper•16m ago•0 comments

Exposed Social Security Numbers May Put Millions at Risk of Identity Theft

https://www.wired.com/story/a-mega-trove-of-exposed-social-security-numbers-underscores-critical-...
1•upguardnews•16m ago•0 comments

A volcano scorched these Roman scrolls – can AI recover their text?

https://www.understandingai.org/p/a-volcano-scorched-hundreds-of-roman
1•speckx•16m ago•0 comments

Show HN: The Extensible, Multi-Agent Personal AI Sidekick

https://github.com/meetopenbot/openbot
4•undersky•17m ago•1 comments
Open in hackernews

Warren Buffett dumps $1.7B of Amazon stock

https://finbold.com/warren-buffett-dumps-1-7-billion-of-amazon-stock/
77•fauria•1h ago

Comments

xvxvx•1h ago
Maybe the novelty of Amazon has worn off. I occasionally purchase from their UK site, and it’s filled with tricks to get me to sign up for Prime upon checkout. Really horrible workflow and design decisions, cheapening the experience. I now see similar changes to the US version: ‘you saved $15 in shipping by being a Prime member with this purchase’ and ‘last year you made 211 sustainable product purchases’.

Guys, quit being so desperate. Concentrate on quality items at competitive pricing and fast delivery. Don’t turn into TJ Maxx.

My Echo, that I use solely to voice activating lights and switches, is now an ad machine and one bad day away from going in the trash. Next time you do a wave of layoffs, please include everyone involved in these horrible decisions.

evmaki•1h ago
> My Echo, that I use solely to voice activating lights and switches, is now an ad machine

I've been wondering if it is even possible for a publicly-traded company to deliver a voice assistant product without these incentives involved. I have to imagine the UX of these devices would be much different if they were built by a private company without the same market pressures. It would need to be self-contained and local, so that the infrastructure burden (e.g., data and AI in the cloud) wouldn't create a need for subscription service or data collection revenue to cover the cost.

vablings•54m ago
This is why devices that are basically loss leaders should always be illegal. The end value product is an update that will come later down the line that screws everything up.

For those considering smart home devices, please just buy a home assistant device. It is easy for the non-technical and also not that much more expensive

drstewart•1h ago
Amazon has become AliExpress at this point, so I just skip the middleman half the time
vablings•55m ago
It's a shame that all these stores have such a terrible UI/UX.

Amazon is pretty good at optimizing buying things but outside of that everything else sucks really bad especially on mobile

password54321•33m ago
Amazon has become a marketplace for cheap sometimes harmful chinese knockoffs. Amazon doesn't even check what is being sold. I only order directly from places I trust. http://nbcnews.com/business/recall/cheap-chinese-faucets-dan...
HanClinto•23m ago
Home Assistant and other open-source projects seem like they may be the only way that we get consumer-friendly devices.

https://github.blog/open-source/maintainers/the-local-first-...

mamma_mia•1h ago
mamma mia! didn't he step down? very cool that he's back in the game
Supermancho•1h ago
Warren Buffet stepped down as CEO from Berkshire Hathaway. He's still involved as Chairman with under 50% stake, afaik.

This was Berkshire Hathaway, not Warren Buffet, despite the misleading title.

giancarlostoro•1h ago
Next time Amazon goes low I'm sure he'll buy it all back at a discount. With all his wealth he can get away with slow patient investing with swathes of cash.
malfist•58m ago
Amazon just shed $450 billion in value. It's low right now.
giancarlostoro•39m ago
Not sure if they can all of a sudden buy it right now, at some point that starts looking like market manipulation. Wait a few years or months, see a ton of companies tank, buy at a discount. We've seen them do this several times.
baggachipz•1m ago
Another Prime membership fee increase, incoming!
divbzero•1h ago
Adding the obligatory disclaimer: Berkshire Hathaway selling $1.7B of Amazon stock is likely a decision by Ted Weschler or Todd Combs, still notable but not necessarily Warren Buffett himself.
SilverElfin•1h ago
After Amazon has been a great friend to the Trump administration, by partnering with Flock, by funding the Melania documentary to basically bribe Trump, etc - why should Americans or others trust them or give them business? Amazon isn’t that interesting anymore. You can buy most things directly from a trusted manufacturer or other websites. I don’t see them doing anything innovative at all. What’s the last useful thing they did - AWS? And that stopped being novel more than 10 years ago.

The problem is, megacorp with infinite capital get to make these massive mistakes and stumble through failure after failure, when everyday entrepreneurs get crushed for the tiniest problem.

PaulDavisThe1st•58m ago
> You can buy most things directly from a trusted manufacturer or other websites.

My experience over the last year has been the opposite. More and more of the specialized bits and pieces I need or want are only sold online via Amazon.

Extremely depressing.

phil21•44m ago
I don't share the Amazon hate everyone has, I've had very good experiences with Amazon retail. But I do sometimes try to spread out my purchases to other vendors due to monopoly concerns.

It's amazing how many times you buy direct from a vendor and then it comes via Fulfilled by Amazon.

The other issue is when anything goes wrong I've had a hell of a time with some vendors. It's a crapshoot - some vendors ship quickly and competently, and handle customer service like returns quite well. Others you might end up with your product not even shipping for a week much less arriving, even though the store says "in stock ships tomorrow". Due to this, when I really must have something on time or if it's a risky purchase I have a good chance of needing to return I tend towards just getting it with Amazon.

A lot of smaller shops simply don't want to deal with logistics and customer service - it's hard to compete on Amazon for shipping costs. And warehouse/returns/etc. is just a nightmare for a small shop. I absolutely understand why a small speciality manufacturer with a few dozen low volume SKUs would prefer to just use FBA and be done with it.

PaulDavisThe1st•37m ago
> it's hard to compete on Amazon for shipping costs.

Not so much that it is hard, as that Amazon more or less forces vendors on its platforms to eat shipping costs.

Insanity•58m ago
“Why should Americans trust them”, I’d go further and say you shouldn’t trust any company.
malfist•57m ago
You can count the number of times Jassy has lead amazon to an innovative new product during his tenure as CEO on zero hands.
PaulDavisThe1st•34m ago
If you consider Amazon to be a retail company, then the comparison is with other retailers. When was the last time a retailer introduced an innovative new product? That's not what retailers do - they figure out where and how to sell <stuff>, other people make the <stuff> and it gets sold. The innovation happens to the <stuff>, not the retail.

Obviously, there are long term trends like the acceptance of credit cards that took place between the late 1970s and late 1980s in the US. But retail isn't exactly known for being a hotbed of innovation.

If you are thinking about other aspects of Amazon (obviously, AWS), then ... I can't comment on that.

renewiltord•49m ago
Personally, I just buy stuff from a store and return it if I don’t like it. I don’t need to trust the store because the US has good enough consumer laws. It’s a store not my wife. I don’t need to have these ethical dilemmas over getting Coke Zero delivered.
Insanity•59m ago
Amazon is pretty volatile stock at the moment, as are most companies that chase the AI bandwagon. I don’t think Amazon is doomed but the companies chasing AI are in for a rough time.

Plus continuing waves of layoffs will lead to more frequent and longer AWS outages, and lower quality of retail products will hurt that side of Amazon.

paxys•59m ago
Berkshire Hathaway, not Warren Buffett.

Large stock sales always make headlines but they don't automatically signal bearishness or really anything else. After all what's the point of investing if you never realize gains?

drob518•49m ago
Yes, but you’d be foolish to realize your gains if you think the stock still has a long way to run. That just triggers taxes and eliminates any further upside. So, we can reasonably conclude that either BH thinks Amazon’s run is nearly exhausted, or it’s one of the stocks with minimal forward prospects in BH’s portfolio and they want to deploy the capital with something that they feel will have a greater return (maybe Amazon still rises, but whatever else they want to invest in they think will rise more/faster).
semiquaver•57m ago
Berkshire Hathaway has my favorite website (or, WEB page, as they style it) of any big company: https://www.berkshirehathaway.com/
buildbot•53m ago
I wonder how much Geico payed for that add placement…
anana_•53m ago
They own GEICO...
buildbot•28m ago
Oh; well that’s embarrassing haha
ewild•51m ago
he owns geico
meindnoch•45m ago

  <meta name="GENERATOR" content="MSHTML 8.00.6001.18828">
*Jurassic Park taking off glasses.gif*
leapingdog•42m ago
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

This brings back some (unpleasant) memories.

But otherwise I admire the minimalism.

chickensong•41m ago
Incredibly clear and direct. Amazing to see a big company like that keeping it so old school. Thanks for pointing it out!
enmyj•40m ago
it's certainly fast!!
scottious•36m ago
I half expected to see an "under construction" gif and a "powered by GeoCities" tag at the bottom
forinti•24m ago
It's definitely missing a website hits counter.
philip1209•53m ago
Warren Buffet retired. This is Berkshire Hathaway.
stackghost•36m ago
My understanding is that Warren gave up his seat as CEO but is still the chairman, and is still at least peripherally involved in investment decisions at Berkshire
s-kymon•11m ago
Also these are year end portfolio changes, so could very well be Warren.
legitster•52m ago
Amazon's core business does not make sense. Despite being so massive, their retail operation makes almost no money. There is little market share left for them to win, the best they can do to grow is shave expenses.

AWS has been their real money maker, but also the explosion of AI and server farms has worked against them in threes ways: there is much more competition on infrastructure, the costs to run infrastructure keep going up, if you're looking for a growth industry there are other more appealing stocks now to park your capital.

novia•50m ago
they could improve their product search page so it's actually useful
wodenokoto•46m ago
They say one of the reasons supermarkets move isles layout is so people don’t learn to navigate the store and they put milk in the back to make sure people have to walk the isles.

The purpose is to get shoppers to look at more stuff and impulse buy.

I honestly believe search is bad for the same reason.

wlesieutre•41m ago
It's useful for making sellers pay for promoted product positions
monero-xmr•47m ago
They could just increase prices. They deliver fast (often same day) and always accept my returns. Add 5% to prices, pure margin.
Aurornis•47m ago
> Amazon's core business does not make sense. Despite being so massive, their retail operation makes almost no money.

Net profit margins for retail are only around 3% across the industry.

Amazon isn't actually doing anything unusual in that regard. Retail is just a very low profit margin business whether it's physical or online.

These numbers are always confusing to those of us in the tech world where SaaS net profit margins are always very high.

legitster•38m ago
This is correct, but it doesn't explain why Amazon would have a 2x market cap over Walmart when they both roughly make the same revenue.

You have to believe that Amazon is poised for much higher growth than they are to justify their current stock price.

tyre•33m ago
These are different businesses. Walmart has a massive retail footprint, where Amazon does not.

Amazon’s huge 3p seller network means it can offer advertising as a revenue stream in a way Walmart can’t compete with.

nikkev•26m ago
Their business models are increasingly converging with both generative revenue through seller fees, subscriptions, and advertising. Amazon is ahead in most of these areas and also has the higher margin revenue from AWS. Amazon also has a large base of prime subscribers they can sell incremental services to.
jcheng•25m ago
The revenue curves do indeed look a bit different:

https://www.macrotrends.net/stocks/stock-comparison?s=revenu...

Even more so if you compare EBITDA:

https://www.macrotrends.net/stocks/stock-comparison?s=ebitda...

nickff•14m ago
It seems like AMZN has significant growth priced-in to the stock, but retail growth will become increasingly challenging as their market share increases.
Reason077•9m ago
> ”it doesn't explain why Amazon would have a 2x market cap over Walmart when they both roughly make the same revenue.”

Why does Tesla have 15x the market cap of BYD, despite BYD selling more cars, having more revenue, and much faster revenue growth?

Aurornis•5m ago
> This is correct, but it doesn't explain why Amazon would have a 2x market cap over Walmart when they both roughly make the same revenue

Because Amazon and Walmart are two different companies with very different product offerings.

Retail can only grow so far. AWS continues to grow at a relatively incredible rate compared to Walmart's business.

NoMoreNicksLeft•2m ago
>You have to believe that Amazon is poised for much higher growth than they are to justify their current stock price.

How many decades now have we lived in a world where the demand for investment far outstrips sane investment opportunities? In such a world, do stock prices have to be justified as you insinuate? And what happens when the prices are far higher than can be justified? I ask not rhetorically, but rather whether I should be hoarding shotgun shells and canned goods and hiding in the basement.

mullingitover•16m ago
Walmart doesn’t have a cloud computing side business that’s wildly profitable.
zeroonetwothree•45m ago
Their profit margin on retail is similar to other discount retailers like Walmart. Retail just doesn’t have huge margins.
taeric•45m ago
I am not so sure this is an accurate analysis? Notably, a major thing that kept it so that retail made no money, was the massive expense of expanding the retail operations. That is, expanding retail footprint is a massive cost. And you have to expand if you want to reach more customers.

This is different from AWS where your reach is essentially "all of the internet" for anything that you launch. But this really just meant that reinvesting the revenue from AWS was harder for them to do, compared to revenue from retail. As a result, they didn't. Not nearly as aggressively.

kypro•42m ago
Depends how you define their "core business" I suppose.

You're right, but their retail business does support the bulk of their ad business which is extremely profitable. Arguably it might actually make sense for them to run their retail business as a loss leader to support their high-margin ad business.

coredog64•39m ago
> Despite being so massive, their retail operation makes almost no money

You misunderstand the point of retail. It's now a marketplace where they use their name recognition and (alleged) consumer friendliness to collect fees from sellers. It costs to list, it costs to do FBA, and it costs to run ads so that your products appear in search results. Amazon ads is incredibly profitable.

That's also why Prime has such a grab bag of benefits. By keeping Prime membership sticky, the overall value of that marketplace supports the fees charged to sellers.

evanjacobs•34m ago
> There is little market share left for them to win

Despite controlling about 40% of US online retail, Amazon only has about an 8% share of total US retail. There’s still plenty of room to grow here.

https://www.emarketer.com/content/amazon-will-surpass-40-of-...

mfrye0•8m ago
Relevant data point on AWS - GCP is giving out a ton of cloud credits to startups. On average $100k in comparison to $10k-20k from AWS.

Before Claude Code, a full cloud migration could easily be a couple months. We migrated our whole stack to GCP in about a week. It's trivial to switch clouds now with K8 stack and Claude Code.

criddell•4m ago
> There is little market share left for them to win, the best they can do to grow is shave expenses.

I think Amazon netted something like $70 billion last year. What's the problem with them just staying the course and earning tens of billions of dollars in profit year-after-year-after-year?

harmmonica•48m ago
It's right in the post, but just to save folks a click it's a 77% drawdown in the position so it's a substantial move. I see they also trimmed Apple, but, for comparison's sake, looks like that was only a decrease of 4.3% of the position.
rvz•42m ago
Berkshire, Not Buffet.

Also, why would anyone want to work at Amazon at this point?

One of the worst companies to join with the worst margins out of the big tech companies.

[0] https://news.ycombinator.com/item?id=46809296

wifipunk•17m ago
Desperation and relatively high compensation.

Every friend I've ever had work for them was burnt out but stayed because they were too burnt out to look for a new job

bau5•5m ago
One positive out of this is that it could bring MacKenzie Scott's net worth down a bit (she still holds significant Amazon stock), leading to her spending less on harmful donations...