Hackers' Pub

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`

Bartosz Milewski @BartoszMilewski@mathstodon.xyz

5/30/2025, 9:05:04 AM

Public

New blog post on homotopies. https://bartoszmilewski.com/2025/05/30/fibrations-and-cofibrations/

Fibrations and Cofibrations

We are used to thinking of a mapping as either being invertible or not. It’s a yes or no question. A mapping between sets is invertible if it’s both injective and surjective. It means t…

bartoszmilewski.com · Bartosz Milewski's Programming Cafe

If you have a fediverse account, you can quote this note from your own instance. Search https://mathstodon.xyz/users/BartoszMilewski/statuses/114595981199536805 on your instance and quote it. (Note that quoting is not supported in Mastodon.)