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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
500•klaussilveira•8h ago•139 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
841•xnx•13h ago•503 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
54•matheusalmeida•1d ago•10 comments

A century of hair samples proves leaded gas ban worked

https://arstechnica.com/science/2026/02/a-century-of-hair-samples-proves-leaded-gas-ban-worked/
112•jnord•4d ago•18 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
164•dmpetrov•9h ago•76 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
166•isitcontent•8h ago•18 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
280•vecti•10h ago•127 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
60•quibono•4d ago•10 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
340•aktau•15h ago•164 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
225•eljojo•11h ago•139 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
332•ostacke•14h ago•89 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
421•todsacerdoti•16h ago•221 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
34•kmm•4d ago•2 comments

Show HN: ARM64 Android Dev Kit

https://github.com/denuoweb/ARM64-ADK
11•denuoweb•1d ago•0 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
360•lstoll•14h ago•251 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
76•SerCe•4h ago•60 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
15•gmays•3h ago•2 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
59•phreda4•8h ago•9 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
9•romes•4d ago•1 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
210•i5heu•11h ago•157 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
33•gfortaine•6h ago•8 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
123•vmatsiiako•13h ago•51 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
159•limoce•3d ago•80 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
257•surprisetalk•3d ago•33 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1017•cdrnsf•18h ago•422 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
51•rescrv•16h ago•17 comments

I'm going to cure my girlfriend's brain tumor

https://andrewjrod.substack.com/p/im-going-to-cure-my-girlfriends-brain
93•ray__•5h ago•46 comments

Evaluating and mitigating the growing risk of LLM-discovered 0-days

https://red.anthropic.com/2026/zero-days/
44•lebovic•1d ago•12 comments

WebView performance significantly slower than PWA

https://issues.chromium.org/issues/40817676
10•denysonique•5h ago•0 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
81•antves•1d ago•59 comments
Open in hackernews

Cyclic Subgroup Sum

https://m-slee.netlify.app/posts/cyclic-subgroup-sum
8•richard_chase•2w ago

Comments

richard_chase•2w ago
Some independent math research just for fun.
WCSTombs•1w ago
This "classification" is pretty much a tautology and provides no information. The enumeration of all subgroups of a cyclic group and their orders is one of the most basic facts in all of group theory and known by pretty much everyone who has studied the subject at all. Thus, I'm completely failing to see the point in any of this.
richard_chase•1w ago
It was more to provide a hopefully new perspective on some existing problems in number theory.
WCSTombs•6d ago
Then nice try I guess, but there is nothing remotely new about any of this. You're not going to find a new perspective on something in math using a completely routine application of a well-known theorem. You'll need to either work really hard or come up with a genuinely new idea, and probably both.
richard_chase•5d ago
I disagree. Math is all about applying well-known theorems to existing problems.
shenberg•1w ago
I don't understand how using group-theory language to describe number-theoretic properties provides extra insight in this case (e.g. conjecture: all perfect numbers are even is more concise than the group-theoretic description given in the page). Can you expand on why you believe the tools of group theory have something to say about this? (e.g. for polynomial roots, the connection with symmetry groups comes from symmetries of factorized polynomials, while there's no obvious-to-me connection here as there is no unique-up-to-symmetry integer factorization)
richard_chase•1w ago
I just found it interesting that certain problems in number theory could be rephrased as problems about cyclic groups. Maybe it could potentially make some easier to solve.