---
date: 2022-03-18 00:02
modification date: Saturday 19th March 2022 00:34:21
title: Barr-Beck
aliases: [Barr-Beck]

---


---

- Tags 
	- #higher-algebra 
- Refs:
	- Proof: <https://www.imo.universite-paris-saclay.fr/~brantner/Spring22L1.pdf>
- Links:
	- #todo/create-links 

---

# Barr-Beck

![](attachments/Pasted%20image%2020220318000206.png)

![](attachments/Pasted%20image%2020220318001010.png)

![](attachments/Pasted%20image%2020220318101339.png)