diff --git a/ring-buffer/mpoquet.tmTheme b/ring-buffer/mpoquet.tmTheme
new file mode 100644
index 0000000000000000000000000000000000000000..9b3a803c3c6d56d167bb4e89c0a2239cc8fbf06a
--- /dev/null
+++ b/ring-buffer/mpoquet.tmTheme
@@ -0,0 +1,374 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+ <key>author</key>
+ <string>Ankur Gupta</string>
+ <key>name</key>
+ <string>GitHub Clean White</string>
+ <key>settings</key>
+ <array>
+ <dict>
+ <key>settings</key>
+ <dict>
+ <key>background</key>
+ <string>#FFFFFF</string>
+ <key>caret</key>
+ <string>#000000</string>
+ <key>foreground</key>
+ <string>#000000</string>
+ <key>invisibles</key>
+ <string>#B3B3B3F4</string>
+ <key>lineHighlight</key>
+ <string>#0000001A</string>
+ <key>selection</key>
+ <string>#BAD6FD</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>String</string>
+ <key>scope</key>
+ <string>string</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#C41A16</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Number</string>
+ <key>scope</key>
+ <string>constant.numeric</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#0086B3</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Keyword</string>
+ <key>scope</key>
+ <string>keyword</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#A71D5D</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Operator</string>
+ <key>scope</key>
+ <string>keyword.operator</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#000000</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Built-in constant</string>
+ <key>scope</key>
+ <string>constant.language</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#0086B3</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Exception</string>
+ <key>scope</key>
+ <string>support.class.exception</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#990000</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Function name</string>
+ <key>scope</key>
+ <string>entity.name.function</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#000000</string>
+ <!-- <key>fontStyle</key>
+ <string>italic</string> -->
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Type name</string>
+ <key>scope</key>
+ <string>entity.name.type</string>
+ <key>settings</key>
+ <dict>
+ <key>fontStyle</key>
+ <string>bold underline</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Arguments</string>
+ <key>scope</key>
+ <string>variable.parameter</string>
+ <key>settings</key>
+ <dict>
+ <key>fontStyle</key>
+ <string>italic</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Comment</string>
+ <key>scope</key>
+ <string>comment</string>
+ <key>settings</key>
+ <dict>
+ <!-- <key>fontStyle</key>
+ <string>italic</string> -->
+ <key>foreground</key>
+ <string>#707070</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Invalid</string>
+ <key>scope</key>
+ <string>invalid</string>
+ <key>settings</key>
+ <dict>
+ <!-- <key>background</key>
+ <string>#E71A114D</string> -->
+ <key>foreground</key>
+ <string>#FF0000</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Trailing whitespace</string>
+ <key>scope</key>
+ <string>invalid.deprecated.trailing-whitespace</string>
+ <key>settings</key>
+ <dict>
+ <key>background</key>
+ <string>#E71A1100</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Embedded source</string>
+ <key>scope</key>
+ <string>text source</string>
+ <key>settings</key>
+ <dict>
+ <key>background</key>
+ <string>#FAFAFAFC</string>
+ <key>foreground</key>
+ <string>#000000</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Tag</string>
+ <key>scope</key>
+ <string>meta.tag, declaration.tag</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#AA0D91</string>
+ </dict>
+ </dict>
+ <!-- <dict>
+ <key>name</key>
+ <string>Constant</string>
+ <key>scope</key>
+ <string>constant, support.constant</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#000000</string>
+ </dict>
+ </dict> -->
+ <dict>
+ <key>name</key>
+ <string>Support</string>
+ <key>scope</key>
+ <string>support</string>
+ <key>settings</key>
+ <dict>
+ <key>fontStyle</key>
+ <string>bold</string>
+ <key>foreground</key>
+ <string>#000000</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Storage</string>
+ <key>scope</key>
+ <string>storage</string>
+ <key>settings</key>
+ <dict>
+ <!-- <key>fontStyle</key>
+ <string>bold</string> -->
+ <key>foreground</key>
+ <string>#AA0D91</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Section name</string>
+ <key>scope</key>
+ <string>entity.name.section</string>
+ <key>settings</key>
+ <dict>
+ <key>fontStyle</key>
+ <string>bold underline</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>Frame title</string>
+ <key>scope</key>
+ <string>entity.name.function.frame</string>
+ <key>settings</key>
+ <dict>
+ <key>fontStyle</key>
+ <string>bold</string>
+ <key>foreground</key>
+ <string>#000000</string>
+ <!-- <string>#881280</string> -->
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>XML Declaration</string>
+ <key>scope</key>
+ <string>meta.tag.preprocessor.xml</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#333333</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>html attribute</string>
+ <key>scope</key>
+ <string>entity.other.attribute-name</string>
+ <key>settings</key>
+ <dict>
+ <key>fontStyle</key>
+ <string>italic</string>
+ <key>foreground</key>
+ <!-- <string>#3366CC</string> -->
+ <string>#0A8585</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>html tag punctuation</string>
+ <key>scope</key>
+ <string>entity.name.tag</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#121289</string>
+ <!-- <key>fontStyle</key>
+ <string>bold</string> -->
+ </dict>
+ </dict>
+ <!-- Adding stuff for diff. This works in ST3 -->
+ <dict>
+ <key>name</key>
+ <string>diff header from</string>
+ <key>scope</key>
+ <string>meta.diff.header.from-file</string>
+ <key>settings</key>
+ <dict>
+ <key>background</key>
+ <string>#FFDDDD</string>
+ <key>fontStyle</key>
+ <string></string>
+ <key>foreground</key>
+ <string>#000000</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>diff header to</string>
+ <key>scope</key>
+ <string>meta.diff.header.to-file</string>
+ <key>settings</key>
+ <dict>
+ <key>background</key>
+ <string>#DDFFDD</string>
+ <key>fontStyle</key>
+ <string></string>
+ <key>foreground</key>
+ <string>#000000</string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>diff inserted</string>
+ <key>scope</key>
+ <string>markup.inserted.diff</string>
+ <key>settings</key>
+ <dict>
+ <key>background</key>
+ <string>#DDFFDD</string>
+ <key>fontStyle</key>
+ <string></string>
+ </dict>
+ </dict>
+ <dict>
+ <key>name</key>
+ <string>diff deleted</string>
+ <key>scope</key>
+ <string>markup.deleted.diff</string>
+ <key>settings</key>
+ <dict>
+ <key>background</key>
+ <string>#FFDDDD</string>
+ <key>fontStyle</key>
+ <string></string>
+ <key>foreground</key>
+ <string>#000000</string>
+ </dict>
+ </dict>
+ <!-- BracketHighlighter colors -->
+ <dict>
+ <key>name</key>
+ <string>BH Color</string>
+ <key>scope</key>
+ <string>brackethighlighter.default</string>
+ <key>settings</key>
+ <dict>
+ <key>foreground</key>
+ <string>#FF992244</string>
+ <key>fontStyle</key>
+ <string>italic</string>
+ </dict>
+ </dict>
+ </array>
+ <key>uuid</key>
+ <string>26786979-843B-4FE2-BCB6-4FCEC6F8FB58</string>
+ <key>colorSpaceName</key>
+ <string>sRGB</string>
+ <key>semanticClass</key>
+ <string>theme.light.git_hub_clean_white</string>
+ <key>comment</key>
+ <string>v1.0 Feb 1, 2015
+Made to look as close to GitHub as possible.</string>
+</dict>
+</plist>
diff --git a/ring-buffer/ring-buffer.pdf b/ring-buffer/ring-buffer.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..3b676ce0c5117a667f03e7d440372c89c6bb703a
Binary files /dev/null and b/ring-buffer/ring-buffer.pdf differ
diff --git a/ring-buffer/ring-buffer.typ b/ring-buffer/ring-buffer.typ
new file mode 100644
index 0000000000000000000000000000000000000000..de0de0ab6f3a8e9c1622c71a1e8640bc9bbc3dcf
--- /dev/null
+++ b/ring-buffer/ring-buffer.typ
@@ -0,0 +1,109 @@
+#import "@preview/touying:0.6.1": *
+#import themes.metropolis: *
+#import "@preview/cetz:0.3.4"
+#import "@preview/codly:1.3.0": *
+#import "@preview/codly-languages:0.1.8": *
+
+#set raw(theme: "mpoquet.tmTheme")
+#show: codly-init.with()
+#codly(display-name: false)
+
+#show strong: it => text(fill: luma(10%), it)
+
+#let cetz-canvas = touying-reducer.with(reduce: cetz.canvas, cover: cetz.draw.hide.with(bounds: true))
+
+#show: metropolis-theme.with(
+ aspect-ratio: "16-9",
+ footer: self => self.info.institution,
+ config-info(
+ title: [Ring buffer],
+ subtitle: [_and in the darkness bind them_],
+ author: [Millian #smallcaps[Poquet]],
+ date: [2025-04-29],
+ ),
+)
+#title-slide()
+
+== Qu'est-ce à dire que ceci ?
+Différents noms pour la même chose : `(ring|cyclic|circular) (buffer|queue|array)`
+
+Accès
+- `put` : ajout d'un élément
+- `get` : récupération d'un élément
+
+Éléments clés
+- Sémantique de file : les éléments ajoutés en premier sont récupérés en premier
+- Buffer à *taille fixe* de `N` cases
+- Utilisation de deux indices : têtes de lecture `r` et d'écriture `w`
+
+Utilité
+- Séquençage d'information entre deux composants matériels
+- File de messages (synchronisée) entre deux composants logiciels
+
+== Exemple d'exécution
+#let ringbuf(buf, w, r) = cetz-canvas({
+ import cetz.draw: *
+ grid((0,0), (buf.len(),1), step: 1)
+ translate(x: .5, y: .5)
+ for i in range(buf.len()) {
+ content((i, 0), [#buf.at(i)])
+ }
+ translate(y: -0.75)
+ if (w != r) {
+ content((r,0), [`r`])
+ content((w,0), [`w`])
+ } else {
+ content((r,0), [`rw`])
+ }
+})
+
+#grid(
+ columns: 2,
+ column-gutter: 3cm,
+ align: top,
+ grid(
+ columns: 2,
+ column-gutter: 1cm,
+ row-gutter: 5mm,
+ align: left+top,
+ [`init(4,0,0)`], ringbuf(([], [], [], []), 0, 0), pause,
+ [`put(3)`], ringbuf((3, [], [], []), 1, 0), pause,
+ [`put(5)`], ringbuf((3, 5, [], []), 2, 0), pause,
+ [`put(7)`], ringbuf((3, 5, 7, []), 3, 0), pause,
+ [`get()→3`], ringbuf((3, 5, 7, []), 3, 1), pause,
+ [`put(11)`], ringbuf((3, 5, 7, 11), 0, 1), pause,
+ ),
+ [
+ #grid(
+ columns: 2,
+ column-gutter: 1cm,
+ row-gutter: 5mm,
+ align: left+top,
+ [`put(13)`], ringbuf((13, 5, 7, 11), 1, 1), pause,
+ [`put(17)`], [???]
+ )
+ #pause
+ #v(1cm)
+ Plusieurs choix possibles selon l'implémentation !
+ - `put` renvoie une erreur : le buffer est plein.
+ - `put` bloque jusqu'à ce que `5` soit récupéré.
+ - `put` écrase `5`.#h(1cm) #box(baseline: 100%, inset: (top: -5mm), ringbuf((13, 17, 7, 11), 2, 1))
+ ],
+)
+
+== Pseudocode d'implémentation — variante _écrase_
+```py
+N = 4
+buf = [0, 0, 0, 0]
+w = 0
+r = 0
+
+def put(elem):
+ buf[w] = elem
+ w = (w + 1) % N
+
+def get():
+ val = buf[r]
+ r = (r + 1) % N
+ return val
+```