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`

Henry Segerman @henryseg@mathstodon.xyz

8/2/2025, 3:44:08 PM

Public

Revisiting the geometry of the tetrahedral racks mechanism. A hexagonal cross section looks like it would be easier to make with subtractive techniques. (Original version at https://www.youtube.com/watch?v=sDJk-9QxFro)

Render of a configuration of twelve rods with rack teeth.

If you have a fediverse account, you can quote this note from your own instance. Search https://mathstodon.xyz/users/henryseg/statuses/114959938263534660 on your instance and quote it. (Note that quoting is not supported in Mastodon.)