MacBookPro.lan 2026-5-31:19:45:55
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"prevs"
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"prevs"
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],
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],
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"lock_view": false,
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"lock_view": false,
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"lock_path": "ensemble de formules contradictoire.md",
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"lock_path": "formule conséquence d'un ensemble de formules.md",
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"custom_sort_fields": false,
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"custom_sort_fields": false,
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"custom_sort_field_labels": []
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"custom_sort_field_labels": []
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},
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},
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"show_attributes": [],
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"show_attributes": [],
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"merge_fields": false,
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"merge_fields": false,
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"lock_view": false,
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"lock_view": false,
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"lock_path": "ensemble de formules contradictoire.md",
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"lock_path": "formule conséquence d'un ensemble de formules.md",
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"field_group_labels": [
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"field_group_labels": [
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"downs"
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"downs"
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],
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],
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---
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up:
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- "[[logique]]"
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tags:
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- s/maths/logique
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aliases:
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---
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```breadcrumbs
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title: "Sous-notes"
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type: tree
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collapse: true
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show-attributes: [field]
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field-groups: [downs]
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depth: [0, 0]
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```
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@@ -5,4 +5,14 @@ tags:
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- s/maths/logique
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- s/maths/logique
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- o
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- o
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aliases:
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aliases:
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- contradictoire
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---
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---
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> [!definition] [[ensemble de formules contradictoire]]
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> Un ensemble de formules $\mathscr{A}$ est **contradictoire** si et seulement si il n'est pas [[ensemble de formules satisfaisable|satisfaisable]]
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^definition
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# Propriétés
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# Exemples
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tags:
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tags:
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- s/maths/logique
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- s/maths/logique
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aliases:
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aliases:
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- satisfaisable
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---
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---
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> [!definition] Définition
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> [!definition] Définition
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@@ -4,6 +4,7 @@ up:
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tags:
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tags:
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- s/maths/logique
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- s/maths/logique
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aliases:
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aliases:
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- satisfait
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---
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---
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> [!definition] [[ensemble de formules satisfait]]
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> [!definition] [[ensemble de formules satisfait]]
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---
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up:
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- "[[calcul propositionnel]]"
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tags:
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- s/maths/logique
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aliases:
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- équivalents
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---
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> [!definition] [[ensembles de formules logiquement équivalents]]
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> Deux ensembles de formules $\mathscr{A}$ et $\mathscr{B}$ sont **équivalents** si et seulement si toute formule de $\mathscr{A}$ est conséquence de $\mathscr{B}$
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^definition
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---
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up:
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- "[[calcul propositionnel]]"
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tags:
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- s/maths/logique
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aliases:
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- conséquence
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- ⊢*
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---
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> [!definition] [[formule conséquence d'un ensemble de formules]]
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> Soit $\mathscr{A}$ un ensembles de formules et $G$ une formule du [[calcul propositionnel]]
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> $G$ est **conséquence** de $\mathscr{A}$ si et seulement si toute distribution de valeurs de vérité qui satisfait $\mathscr{A}$
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^definition
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# Propriétés
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> [!proposition]+
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> $\mathscr{A} \vdash^{*} G \iff \mathscr{A} \cup \{ G \}$ est [[ensemble de formules contradictoire|contradictoire]]
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> > [!démonstration]- Démonstration
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> > - $\boxed{\implies}$ supposons que $\mathscr{A} \vdash^{*} G$
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> > Soit $\delta$ une [[valuation]] qui [[ensemble de formules satisfait|satisfait]] $\mathscr{A}$, i.e. $\forall F \in \mathscr{A},\quad \delta(F) = 1$
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> > Puisque l'on a supposé $\mathscr{A} \vdash^{*} G$ sait que $\delta(G)=1$, et donc que $\delta(\neg G) = 0$, ce qui montre bien qu'un
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# Exemples
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> collapse: true
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> collapse: true
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> show-attributes: [field]
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> show-attributes: [field]
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> field-groups: [downs]
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> field-groups: [downs]
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> depth: [0, 0]
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> depth: [0, 2]
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> ```
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> ```
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---
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up:
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tags:
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aliases:
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---
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> [!todo] Projets non-commencés
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> ```dataview
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> LIST title
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> FROM ""
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> WHERE econtains(up, this.file.link)
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> ```
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---
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link: "https://jplattel.nl/project/ov-klok/"
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author:
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published: 2024-02-14
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created: 2026-05-31
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description: "I’m Joost Plattel, I'd like to call myself an auxiliary technologist. I assist organisations and individuals with technology and help them future strategies."
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tags:
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- "t/clippings"
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---
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The [OV Klok](https://ovklok.nl/) is a small hardware project that show the time left before the next departure of public transport you use. It’s made with and ESP32 module and 7 segment digit display.
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You can [order one](https://shop.ovklok.nl/) if you live in the Netherlands and use public transport a lot from a specific location. The enclosure is made by pressure-forming plastic in the [Mayku Multiplier](https://mayku.me/multiplier) and a 3D print allowing for different methods of mounting and freestanding use.
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The ESP32 runs on Circuit Python and is fully configurable with a USB-C cable through the browser with the use of WebSerial. This skips troublesome setups like captive portals or file editing. It’s a simple and calm device allowing you to catch your public transport right on time!
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---
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---
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up:
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up:
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- "[[logique]]"
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tags:
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tags:
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- s/maths/logique/modèles
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aliases:
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aliases:
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---
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---
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```breadcrumbs
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```breadcrumbs
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title: "Sous-notes"
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title: "Sous-notes"
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type: tree
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type: tree
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