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meindnochon Hilariously fast volume computation with the divergence theorem (2018)

The divergence theorem can be intuitively summarized in one sentence: "what comes out is whatever went in, plus whatever was produced inside"

meindnochon Hilariously fast volume computation with the divergence theorem (2018)

Don't really need vector calculus for this. Geometric intuition is sufficient. It is simply the summation of signed volumes of triangular columns/prisms parallel to the X axis.

Visualization: https://jsfiddle.net/L7r1hwca/

I don't know what they could possibly mean by the naïve algorithms with rendering and sampling (???).

meindnochon Serve Markdown to AI Agents with Accept Headers

It depends on one question: does Markdown support <script> tags?

meindnochon Serve Markdown to AI Agents with Accept Headers

>What about clean, semantic HTML?

Which React package is this?

meindnochon Serve Markdown to AI Agents with Accept Headers

>On the caching impact, Simon Willison wrote:

Wrong: https://developers.cloudflare.com/cache/concepts/vary/

meindnochon A curmudgeon tries a language server

That intro would make much more sense if you replaced "Lisp" with "Smalltalk".

meindnochon Flat Chair by Sara Paculdo

Looks extremely uncomfortable and unstable.

meindnochon On AI regulation and messaging

pardon?

meindnochon AI;DR (AI; Didn't Read)

Yeah, I wonder why! /s

meindnochon On AI regulation and messaging

context: https://www.forbes.com/sites/alisondurkee/2026/08/14/who-is-...

"Cami Clark, the low-profile wife of Anthropic CEO Dario Amodei, tried to court Jeffrey Epstein as an investor for her “luxury porn company” and women’s health startup, the Wall Street Journal and emails in the Epstein files reveal, as the Journal’s reporting raises new questions about Clark’s influence over her powerful husband and his company."

What a slimy couple.

meindnochon On AI regulation and messaging

> A crude analogy is that the formal court system can sometimes feel stuffy and elitist, but it does a much better job of defending the rights of vulnerable individuals than the alternative, mob justice.

Especially when said individuals are rich.

meindnochon Google is making private AI practical with homomorphic encryption

Yeah, I have doubts too. It's much higher than that.

meindnochon Everyone talks about AI agents. This is what one looks from the inside

It doesn't matter. Don't editorialize submission titles.

meindnochon Google is making private AI practical with homomorphic encryption

Great, private AI, at the cost of >1000x the resource usage. Because apparently AI companies weren't already using quite enough energy to cook the planet.

The most private AI is the one running on my own hardware, not in some giant data center.

meindnochon Everyone talks about AI agents. This is what one looks from the inside

actual title: What Vault Operator can do

meindnochon Graduate student proves a quantum uncertainty principle for fractals

Another phenomena that boils down to this is the diffraction limit in optics. I.e. the far-field diffraction pattern produced by a point source (c.f. point spread function) is the spatial Fourier transform of the aperture shape. Thus the aperture and the point-spread function satisfy a similar relation to the momentum-position uncertainty principle.

meindnochon France to ban unsolicited telemarketing calls

>how do you keep promoting or selling your product if yiu cannot find your customers?

You don't.

meindnochon Picophysics: Single file physics for games on platforms like N64, PSX, DC

No.

The reason is that the PlayStation doesn't have perspective-correct texcoord interpolation.

meindnochon Parsers don't have to be complicated

cc @burntsushi

meindnochon Parsers don't have to be complicated

>according to that regex this is a valid url >__..__..%%%zz..

Correctly. It is a valid relative URI, whose path is "__..__..%%%zz..".

meindnochon Parsers don't have to be complicated

>The problem comes when you try to break down the authority portion into host and port

That's a problem orthogonal to URI parsing.

You parse the URI with the RFC 3986 regex, which gives you the components: scheme, authority, path, query, fragment.

You're then free to parse any of the components according to your own bespoke rules, e.g. the query string often follows the key=value&key=value&... pattern.

meindnochon Parsers don't have to be complicated

Is that so?

RFC 3986 Appendix B [1] "Parsing a URI Reference with a Regular Expression":

The following line is the regular expression for breaking-down a well-formed URI reference into its components.

  ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?

      scheme    = $2
      authority = $4
      path      = $5
      query     = $7
      fragment  = $9

Let's test your URI with this regex, shall we? [2]

  $2 (scheme) = http
  $4 (authority) = [f021:d981:b487:e57d:193e:550e::]
  $5 (path) = /

Seems correct to me.

[1] https://datatracker.ietf.org/doc/html/rfc3986#appendix-B

[2] https://regexr.com/8nqop

meindnochon São Paulo resident transforms degraded area into urban forest

AI-generated image → instant churn

meindnochon Dress made of living mycelium can renew and repair itself

Pretty disgusting tbh.

meindnochon Discovery Loop

I smell vapor.

meindnochon Intelligence Is Not the Main Bottleneck

Well, we knew since the "Roko's Basilisk" debacle that they're prone to magical thinking.

meindnochon Show HN: Kakehashi – Experimental userspace to run macOS binaries on Linux ARM

How did he predict your comment?

meindnochon How My Images Are Dithered

"This is also how I learned one way that Photoshop was for professionals and GIMP & ImageMagick weren’t; At the time (and this was years ago, to be fair), Photoshop dithered by default when going from 16 to 8 bits, while those popular open source tools did not and also did not even have good ways to do it manually by adding the right amount of noise before changing the bit depth."

Yes. Photoshop does the correct thing when going 8bit via the "Mode" menu. On the other hand, if you do "Export As → PNG" and check the "Smaller file (8-bit)" checkbox, it does NOT dither, and it produces banding artifacts.

meindnochon My Images Are Dithered

Absolutely! Higher precision is always better. But if you must go as low as 8bits, you should dither.