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The End of Software as a Business?

https://www.thatwastheweek.com/p/ai-is-growing-up-its-ceos-arent
1•kteare•51s ago•0 comments

Exploring 1,400 reusable skills for AI coding tools

https://ai-devkit.com/skills/
1•hoangnnguyen•1m ago•0 comments

Show HN: A unique twist on Tetris and block puzzle

https://playdropstack.com/
1•lastodyssey•4m ago•0 comments

The logs I never read

https://pydantic.dev/articles/the-logs-i-never-read
1•nojito•6m ago•0 comments

How to use AI with expressive writing without generating AI slop

https://idratherbewriting.com/blog/bakhtin-collapse-ai-expressive-writing
1•cnunciato•7m ago•0 comments

Show HN: LinkScope – Real-Time UART Analyzer Using ESP32-S3 and PC GUI

https://github.com/choihimchan/linkscope-bpu-uart-analyzer
1•octablock•7m ago•0 comments

Cppsp v1.4.5–custom pattern-driven, nested, namespace-scoped templates

https://github.com/user19870/cppsp
1•user19870•8m ago•1 comments

The next frontier in weight-loss drugs: one-time gene therapy

https://www.washingtonpost.com/health/2026/01/24/fractyl-glp1-gene-therapy/
1•bookofjoe•11m ago•1 comments

At Age 25, Wikipedia Refuses to Evolve

https://spectrum.ieee.org/wikipedia-at-25
1•asdefghyk•14m ago•3 comments

Show HN: ReviewReact – AI review responses inside Google Maps ($19/mo)

https://reviewreact.com
2•sara_builds•14m ago•1 comments

Why AlphaTensor Failed at 3x3 Matrix Multiplication: The Anchor Barrier

https://zenodo.org/records/18514533
1•DarenWatson•15m ago•0 comments

Ask HN: How much of your token use is fixing the bugs Claude Code causes?

1•laurex•19m ago•0 comments

Show HN: Agents – Sync MCP Configs Across Claude, Cursor, Codex Automatically

https://github.com/amtiYo/agents
1•amtiyo•20m ago•0 comments

Hello

1•otrebladih•21m ago•0 comments

FSD helped save my father's life during a heart attack

https://twitter.com/JJackBrandt/status/2019852423980875794
2•blacktulip•24m ago•0 comments

Show HN: Writtte – Draft and publish articles without reformatting, anywhere

https://writtte.xyz
1•lasgawe•26m ago•0 comments

Portuguese icon (FROM A CAN) makes a simple meal (Canned Fish Files) [video]

https://www.youtube.com/watch?v=e9FUdOfp8ME
1•zeristor•27m ago•0 comments

Brookhaven Lab's RHIC Concludes 25-Year Run with Final Collisions

https://www.hpcwire.com/off-the-wire/brookhaven-labs-rhic-concludes-25-year-run-with-final-collis...
2•gnufx•30m ago•0 comments

Transcribe your aunts post cards with Gemini 3 Pro

https://leserli.ch/ocr/
1•nielstron•33m ago•0 comments

.72% Variance Lance

1•mav5431•35m ago•0 comments

ReKindle – web-based operating system designed specifically for E-ink devices

https://rekindle.ink
1•JSLegendDev•36m ago•0 comments

Encrypt It

https://encryptitalready.org/
1•u1hcw9nx•36m ago•1 comments

NextMatch – 5-minute video speed dating to reduce ghosting

https://nextmatchdating.netlify.app/
1•Halinani8•37m ago•1 comments

Personalizing esketamine treatment in TRD and TRBD

https://www.frontiersin.org/articles/10.3389/fpsyt.2025.1736114
1•PaulHoule•38m ago•0 comments

SpaceKit.xyz – a browser‑native VM for decentralized compute

https://spacekit.xyz
1•astorrivera•39m ago•0 comments

NotebookLM: The AI that only learns from you

https://byandrev.dev/en/blog/what-is-notebooklm
2•byandrev•39m ago•2 comments

Show HN: An open-source starter kit for developing with Postgres and ClickHouse

https://github.com/ClickHouse/postgres-clickhouse-stack
1•saisrirampur•40m ago•0 comments

Game Boy Advance d-pad capacitor measurements

https://gekkio.fi/blog/2026/game-boy-advance-d-pad-capacitor-measurements/
1•todsacerdoti•40m ago•0 comments

South Korean crypto firm accidentally sends $44B in bitcoins to users

https://www.reuters.com/world/asia-pacific/crypto-firm-accidentally-sends-44-billion-bitcoins-use...
2•layer8•41m ago•0 comments

Apache Poison Fountain

https://gist.github.com/jwakely/a511a5cab5eb36d088ecd1659fcee1d5
1•atomic128•43m ago•2 comments
Open in hackernews

Street-Fighting Mathematics (2008)

https://ocw.mit.edu/courses/18-098-street-fighting-mathematics-january-iap-2008/pages/readings/
59•mpweiher•1mo ago

Comments

stmw•1mo ago
This is a good book. Also, any time this kind of book becomes available (be it a 100 year old one or a new one), it is worth looking into - great improvements in isnight and simplicity are possible above the "baseline" of US math education today.

So for example, I posit that the engineers or scientists you might admire from the 1950's didn't learn calculus or linear algebra the way you did.

gpcz•1mo ago
Feynman learned calculus from the textbook "Calculus for the Practical Man".
nutjob2•1mo ago
Book PDF is here: https://direct.mit.edu/books/oa-monograph-pdf/2284035/book_9...
marci•1mo ago
This is the draft, not the current version.

edit: and for the current unfortunately there's only a dead dropbox link.

NooneAtAll3•1mo ago
what is it about?

how to distribute fighters so that your team defeats-in-detail your opponents?

slow_typist•1mo ago
It is about useful tricks you can usually not learn in university classes.
NooneAtAll3•1mo ago
tricks of what kind
wolfi1•1mo ago
fast multiplying for example
slow_typist•4w ago
Also how to make good estimates, and how to work with units.

One example, the formula to get the speed of a thing after h meters of free fall must deliver an outcome of m/s. We also know the gravitational acceleration g is given in m/s^2. Then, height h in m must somehow be part of the formula. We can get rid of the squaresecond in the denominator by drawing the square root. But then we also need the height in meters. Also it is clear that both more height as well as a higher acceleration must lead to higher speed. Therefore, the speed must be proportional to sqrt(h x g). In fact it is v = 1/2 sqrt(h x g) but we can derive the important part only from knowing how to calculate with units.

brennanpeterson•1mo ago
I also quite liked https://ocw.mit.edu/courses/res-6-011-the-art-of-insight-in-...

Which is, I think, the successor and quite useful.

rm445•1mo ago
I've read this book. It's definitely one of the more interesting and readable maths texts out there. I wasn't exactly sure I'd use the methods. Working as a mechanical engineer I probably go straight to numerical methods, or approximate things even more crudely and approximately than a mathematician's 'rough' work. Though "replace a complicated function with a rectangle" definitely resonated. Overall the impression was that it was full of great techniques for mathematicians and scientists puzzling out every bit of meaning they can from a situation whose true features aren't yet known.
ErroneousBosh•1mo ago
That's kind of how I do maths, too. Working out the lengths of antenna feeders, for example, where a coil of cable is about 30cm across. One turn of that is about one metre, so a coil with ten turns is about ten metres. Roughly. Close enough. I can coil it up shorter but I can't coil it up longer.

If I'm doing really precise stuff, I'm either doing it on a computer already or it's something that's just going to have to be "adjusted" into place when it's done.

In high school my maths teacher said "You'll need to learn all this, you won't always have a calculator!"

My dude, I am walking around with a supercomputer the size of half a slice of bread in my pocket, that probably has a sizeable fraction of the total computing power available in the world when you told me that.

It turns out I don't need either of these things, I just need a good sense of "yeah that feels about right".

stefanfisk•1mo ago
Not to mention instant and searchable access to more subject matter than he’d seen in his whole lifetime.
groundzeros2015•1mo ago
Another book title aimed at getting people who haven’t read their pile of books to buy another.
jesuslop•1mo ago
I skimmed the chapter on operators (7) and always liked that way of thinking (plug things like the derivative operation D into things that expect numbers instead, and see what happens). So plugging into 1/x and getting integrals. Dattoli and Tom Copeland do serious stuff starting from that kind of considerations that go way beyond cocktail party tricks.