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calcul conjonctif.md
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calcul conjonctif.md
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up::[[requête]]
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#informatique
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---
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- $R(a, b, \dots)$
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- $\varphi \wedge \psi$ où $\varphi$ et $\psi$ sont des requêtes valides
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- $\exists y \varphi$ où $\varphi$ est une rête valide (et $y$ est une variable)
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# Exemple
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en [[langage à base de règles]] :
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- $\text{ans}(r) \leftarrow \text{film}(t, r, a), \text{réalisateur}(r, n)$
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en [[calcul conjonctif]] :
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- $\{ r \mid \exists t, a, n \text{film}(t, r, a) \wedge \text{réalisateur}(r, n)\}$
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# Sous-notes
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> [!query] Sous-notes de `=this.file.link`
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> ```dataview
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> TABLE title, up as "Up", up.up as "2-Up", up.up.up as "3-Up", up.up.up.up as "4-Up"
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> FROM -#cours AND -#exercice AND -"daily" AND -#excalidraw AND -#MOC
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> WHERE any(map([up, up.up, up.up.up, up.up.up.up], (x) => econtains(x, this.file.link)))
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> WHERE file.link != this.file.link
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> SORT up.up.up.up, up.up.up, up.up, up
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> ```
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