Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

Dan Piponi @dpiponi@mathstodon.xyz

1/6/2026, 5:27:40 PM

Public

When I was a kid my parents gave me a set of Childcraft books of which one was a book on art:

https://archive.org/details/lookagainchildcr0000chil

One of my favourite works in it was "Square of Three" by American artist Reginald Neal:

https://chrysler.emuseum.com/objects/22126/square-of-three-black-and-white

So I thought I'd write the shader. It's fun to stare at random parts for extended periods of time...

https://www.shadertoy.com/view/tcKfWG

A black and white image of fine lines filling a square space arranged in a way that suggests a 3x3 grid of squares, each containing a nest of squares. It squirms about all over the place due to optical illusionary effects.

If you have a fediverse account, you can quote this note from your own instance. Search https://mathstodon.xyz/users/dpiponi/statuses/115849328109943296 on your instance and quote it. (Note that quoting is not supported in Mastodon.)