from github to this gitea

This commit is contained in:
oscar.plaisant@icloud.com
2023-10-23 23:09:51 +02:00
commit a2ee0fa5ca
2898 changed files with 307871 additions and 0 deletions

27
morphisme.md Normal file
View File

@@ -0,0 +1,27 @@
---
sr-due: 2022-09-29
sr-interval: 39
sr-ease: 278
alias: "morphismes"
---
up::[[structure algébrique]]
title::"$\begin{align}f :& (E, *) \to (F, \bot)\\ &x \mapsto f(x)\end{align}$", "$f(x*y) = f(x)\bot f(y)$"
#maths/algèbre
----
> [!definition] Morphisme
> Soit $(E, *)$ et $(F, \bot)$ deux ensembles munis d'une [[loi de composition interne]]
> Soit $f: (E, *) \to (F, \bot)$ une [[application]]
> $f$ est un **morphisme** ssi :
> $\forall (x, y) \in E^{2}, \quad \boxed{f(x*y) = f(x) \bot f(y)}$
^definition
# Exemple
$$\begin{aligned}
\ln :& (\mathbb R, +) \mapsto (\mathbb R, \times)\\
&x\mapsto \ln(x)
\end{aligned}$$
Ici, on voit que $\ln$ "transforme" la loi $+$ en loi $\times$