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`

José A. Alonso @Jose_A_Alonso@mathstodon.xyz

2/4/2026, 12:56:40 PM

Public

Propositional logic proofs using Lean 4. ~ Kaue Silveira. https://kaue.me/wealth/career/propositional-logic-proofs-using-lean-4/ #ITP #LeanProver #Logic #Math

Propositional Logic Proofs Using Lean 4 - Kaue's Way of Life

This post provides a technical walkthrough of fundamental propositional logic concepts and their formal implementation using the Lean 4 programming language and theorem prover. It serves as a practical guide for constructing proofs from first principles, starting with basic logical constants and advancing to mathematical structures like natural numbers. Kaue's Way of Life.

kaue.me

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