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A free Dynamic QR Code generator (no expiring links)

https://free-dynamic-qr-generator.com/
1•nookeshkarri7•27s ago•1 comments

nextTick but for React.js

https://suhaotian.github.io/use-next-tick/
1•jeremy_su•1m ago•0 comments

Show HN: I Built an AI-Powered Pull Request Review Tool

https://github.com/HighGarden-Studio/HighReview
1•highgarden•2m ago•0 comments

Git-am applies commit message diffs

https://lore.kernel.org/git/bcqvh7ahjjgzpgxwnr4kh3hfkksfruf54refyry3ha7qk7dldf@fij5calmscvm/
1•rkta•4m ago•0 comments

ClawEmail: 1min setup for OpenClaw agents with Gmail, Docs

https://clawemail.com
1•aleks5678•11m ago•1 comments

UnAutomating the Economy: More Labor but at What Cost?

https://www.greshm.org/blog/unautomating-the-economy/
1•Suncho•18m ago•1 comments

Show HN: Gettorr – Stream magnet links in the browser via WebRTC (no install)

https://gettorr.com/
1•BenaouidateMed•19m ago•0 comments

Statin drugs safer than previously thought

https://www.semafor.com/article/02/06/2026/statin-drugs-safer-than-previously-thought
1•stareatgoats•21m ago•0 comments

Handy when you just want to distract yourself for a moment

https://d6.h5go.life/
1•TrendSpotterPro•22m ago•0 comments

More States Are Taking Aim at a Controversial Early Reading Method

https://www.edweek.org/teaching-learning/more-states-are-taking-aim-at-a-controversial-early-read...
1•lelanthran•24m ago•0 comments

AI will not save developer productivity

https://www.infoworld.com/article/4125409/ai-will-not-save-developer-productivity.html
1•indentit•29m ago•0 comments

How I do and don't use agents

https://twitter.com/jessfraz/status/2019975917863661760
1•tosh•35m ago•0 comments

BTDUex Safe? The Back End Withdrawal Anomalies

1•aoijfoqfw•37m ago•0 comments

Show HN: Compile-Time Vibe Coding

https://github.com/Michael-JB/vibecode
5•michaelchicory•40m ago•1 comments

Show HN: Ensemble – macOS App to Manage Claude Code Skills, MCPs, and Claude.md

https://github.com/O0000-code/Ensemble
1•IO0oI•43m ago•1 comments

PR to support XMPP channels in OpenClaw

https://github.com/openclaw/openclaw/pull/9741
1•mickael•44m ago•0 comments

Twenty: A Modern Alternative to Salesforce

https://github.com/twentyhq/twenty
1•tosh•45m ago•0 comments

Raspberry Pi: More memory-driven price rises

https://www.raspberrypi.com/news/more-memory-driven-price-rises/
2•calcifer•51m ago•0 comments

Level Up Your Gaming

https://d4.h5go.life/
1•LinkLens•55m ago•1 comments

Di.day is a movement to encourage people to ditch Big Tech

https://itsfoss.com/news/di-day-celebration/
3•MilnerRoute•56m ago•0 comments

Show HN: AI generated personal affirmations playing when your phone is locked

https://MyAffirmations.Guru
4•alaserm•57m ago•3 comments

Show HN: GTM MCP Server- Let AI Manage Your Google Tag Manager Containers

https://github.com/paolobietolini/gtm-mcp-server
1•paolobietolini•58m ago•0 comments

Launch of X (Twitter) API Pay-per-Use Pricing

https://devcommunity.x.com/t/announcing-the-launch-of-x-api-pay-per-use-pricing/256476
1•thinkingemote•58m ago•0 comments

Facebook seemingly randomly bans tons of users

https://old.reddit.com/r/facebookdisabledme/
1•dirteater_•1h ago•1 comments

Global Bird Count Event

https://www.birdcount.org/
1•downboots•1h ago•0 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
2•soheilpro•1h ago•0 comments

Jon Stewart – One of My Favorite People – What Now? with Trevor Noah Podcast [video]

https://www.youtube.com/watch?v=44uC12g9ZVk
2•consumer451•1h ago•0 comments

P2P crypto exchange development company

1•sonniya•1h ago•0 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
2•jesperordrup•1h ago•0 comments

Write for Your Readers Even If They Are Agents

https://commonsware.com/blog/2026/02/06/write-for-your-readers-even-if-they-are-agents.html
1•ingve•1h ago•0 comments
Open in hackernews

Quantum Computing and the Hidden Subgroup Problem

https://www.daniellowengrub.com/blog/2025/04/23/hidden-subgroup
40•lowdanie•8mo ago

Comments

aaaronic•8mo ago
I’m afraid I couldn’t follow. Too long since I used most of those terms or symbols.

Can anyone ELI5?

cut3•8mo ago
Claude summed it up like this:

The Hidden Subgroup Problem (HSP) is the mathematical framework that explains why quantum computers are so good at breaking encryption. Famous quantum algorithms like Shor's (for factoring numbers) and Simon's are all just different versions of solving the same underlying pattern-finding problem. The quantum "superpower" comes from using the Quantum Fourier Transform to reveal hidden mathematical patterns that classical computers can't efficiently find.

tylerhou•8mo ago
I think it would be hard to explain the details to a math undergraduate.

The high level point is that many algorithms for which quantum speedups are possible can be reduced to the Hidden Subgroup Problem, which requires a few weeks of a group theory course to understand.

almostgotcaught•8mo ago
No it wouldn't? "Given f that hides a subgroup, and an oracle for f, determine the subgroup".

The Wikipedia phrases it backwards (as do you): "quantum computers" don't solve the hidden subgroup problem, the quantum fourier transform, which "measures" f in parallel, can be used to solve the hidden subgroup problem efficiently. The QFT is the fundamental thing, not the HSP, and it's the building block for basically any/all useful quantum algorithms.

dist-epoch•8mo ago
That's very pedantic, like saying "computers don't solve integer addition, AND/OR/NOT/XOR gates solve it, those are the fundamental thing".
almostgotcaught•8mo ago
> That's very pedantic

Yes because we're talking about pure math here not popcorn and soda.

gsf_emergency•8mo ago
My attempt at less offensive analogies:

"Efficiency of hw arithmetic is not the bottleneck, lack of a poly time algo to factor prime numbers is"

&, the closely related

"Ability to reduce everything to HSP is not the bottleneck, lack of a scaleable implementation of qFT is"

tylerhou•7mo ago
Very late, but I meant it would be hard to summarize the details of the blog post (e.g. QFT implementation) even to the typical math undergraduate.

It's not hard to explain the problem, as most math undergraduates will have taken some group theory course. But even "subgroup" means nothing to most computer scientists (speaking from personal experience interacting with computer scientist academics).

FilosofumRex•8mo ago
A crude explanation might be like this - if you look at graphs of sin and cos, you'd instantly recognize their symmetries, but what if you're given the graph of a linear combination of them, and asked to decipher the coefficients?

Naively, you'd evaluate the functions at every point by trial & error until they much the shape of the given graph. Or use the symmetry of sin & cos to combine them constructively and destructively (peaks and valley) and to match the given shape.

FT & QFT are "shortcuts" that help to decipher the correct combination of basis functions.

rahulprasath•8mo ago
Can quantum computers solve hard problems that aren’t HSPs?
charleyc•8mo ago
Fantastic writeup! The exposition is extremely clear.

I particularly appreciate the choice of Simon's Algorithm as a "toy example" and the quick recap of character theory; both were very helpful for a non-QC person with an interest in this stuff.

lowdanie•8mo ago
Thanks!