Hacker News

Top stories

Live mirror
30 storiesupdated just nowView source snapshot
  1. Cloudflare Quick Tunnels(cloudflare.com ↗)
    142comments
  2. Photon-Emission-Guided Laser Fault Injection Enables RP2350 Secure Debug(ledger.com ↗)
    12comments
  3. Show HN: Cactus Needle 3: 8-29MB automation models can match DeepSeek V4 Flash(cactuscompute.com ↗)
    29comments
  4. North Korean nuclear test sets off years of earthquakes(science.org ↗)
    90comments
  5. OpenJev(openjev.com ↗)
    216comments
  6. US Military had close call after using AI for hallucinated intelligence report(cnn.com ↗)
    25comments
  7. C++26: Trivial infinite loops are no longer undefined behaviour(sandordargo.com ↗)
    114comments
  8. Show HN: Ax-check.com – Can agents use your product?(ax-check.com ↗)
    discuss
  9. Systemd is a suite of basic building blocks(systemd.io ↗)
    6comments
  10. I vibed a proof of Conway's conjecture(overreacted.io ↗)
    122comments
  11. A heap overflow and SSO misconfiguration to compromise OpenAI internal repos(hacktron.ai ↗)
    184comments
  12. Mathematicians Build Long-Awaited Graph Sandwich(quantamagazine.org ↗)
    6comments
  13. Grok Voice Transcribe 2.0(x.ai ↗)
    2comments
  14. I don't like passkeys(hawksley.dev ↗)
    577comments
  15. Jemalloc 5.4.0(github.com/jemalloc ↗)
    76comments
  16. NATS publishes preliminary report on technical incident of 8 September(nats.aero ↗)
    24comments
  17. The scourge of x86 emulation(fex-emu.com ↗)
    71comments
  18. Show HN: Scry, programmable internet search w/ congestion pricing(scry.io ↗)
    4comments
  19. Cekura (YC F24) Is Hiring(ycombinator.com ↗)
    discuss
  20. GrassLobster: AI Agentic Generation of Parametric Geometry Workflows(miro.vision ↗)
    4comments
  21. The Shadows Lurking in the Equations – Underwater Islands(gods.art ↗)
    10comments
  22. Warren Buffett Steps Down as Berkshire Chairman, Names Son to Replace Him(nytimes.com ↗)
    166comments
  23. BeanShell3 in Development(beanshell.github.io ↗)
    15comments
  24. Replacing Pull Requests with Delta(zed.dev ↗)
    74comments
  25. AI chatbots are becoming experts at changing people's minds(science.org ↗)
    81comments
  26. An empirical study of harness design for coding agents(arxiv.org ↗)
    43comments
  27. Build Faster Feedback Loops Using Qualitative User Research(nseldeib.com ↗)
    2comments
  28. Pre-Greek: The lost language hidden within Ancient Greek(linguisticdiscovery.com ↗)
    62comments
  29. Microsoft exec called AI scraping 'the largest theft of labor in human history'(techcrunch.com ↗)
    671comments
  30. Second Circuit Allows Government to Search Electronic Devices at the Border(knightcolumbia.org ↗)
    58comments

The Shadows Lurking in the Equations – Underwater Islands

55 pointsby 2d agogods.art
10 comments
4h agoHN ↗

That has another name but I forget. Essentially contour plotting in high res.

3h agoHN ↗

Do you mean Marching Squares? Or Signed Distance Fields? Both are related, but not exactly the same.

4h agoHN ↗

These visualizations are cool, but I feel only a little misleading. Any 2D relation can be plotted in 3D, and setting z=0 shows the original line in 2D. The whole notion of fuzzy is really just saying "let's make a heat map of how far z is from 0". That said, I can see how for some people, thinking about the roots of a function in 3D this way _could_ help unlock deeper understanding of where your roots are at than just staring at 3D graph.

3h agoHN ↗

Also, the visualisations are to some extent an artifact of how you arrange the equation: rearranging terms between the left and right side won't change the line but it will change these visualisations. The first example illustrates it nicely: the 'hole' only exists because of a redundant division by (x^2 + y^2) on either side of the equation.

3h agoHN ↗

My gut tells me that exploring mathematics in this way has very high potential for bringing on future advancements. (1) Simple elements that (2) reveal coherent structures, and were (3) hidden to historic geniuses due to requiring exhaustive computation.

2h agoHN ↗

It’s not so interesting I think.

They’re basically just taking equations of the form f(x,y)=k where k=0, and asking “ah but what about when k!=0”?

Indeed, looking at the constant as a variable by looking at the equation f(x,y)=z IS quite useful. (I’m reminded of Feynman favorite trick for solving integrals). That generalization trick is actually useful in MANY contexts. But there’s nothing novel here.

2h agoHN ↗

The same trick is used in f(R) theories, where the Ricci scalar in General Relativity is replaced with a linear function. https://en.wikipedia.org/wiki/F(R)_gravity

Reminds me of TRIZ methods too, trying to find assumptions or constraints and playing with variations of them.

So yeah, nothing novel here.