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

3/21/2025, 6:09:09 PM

Public

Demostraciones de "(a ∖ b) ∖ c ⊆ a ∖ (b ∪ c)" con Lean4 y con Isabelle/HOL. https://jaalonso.github.io/calculemus/posts/2021/05/19-diferencia_de_diferencia_de_conjuntos/ #LeanProver #IsabelleHOL #Math #Calculemus

Diferencia de diferencia de conjuntos

Demostrar con Lean4 y con Isabelle/HOL que \[ (s \setminus t) \setminus u ⊆ s \setminus (t ∪ u) \] Para ello, completar la siguiente teoría de Lean4: import Mathlib.Data.Set.Basic import Mathlib.Tacti

jaalonso.github.io · Calculemus

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