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associativité.md
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associativité.md
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alias: "associative"
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sr-due: 2023-03-29
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sr-interval: 235
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sr-ease: 328
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---
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up::[[loi de composition interne]]
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#maths/algèbre
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---
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Une [[loi de composition interne]] $*$ sur un ensemble $E$ est associative ssi : $\forall(a,b,c)\in E^3, a*(b*c) = (a*b)*c$
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Si la loi est associative, on peut écrire : $a*b*c$ (on a plus besoin des parenthèses)
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