Ivan Shishkin, Birch Grove

Subset

Definition / Mathematical formalism /

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A set AA is a subset of a set EE if every element of AA also belongs to EE. We write
A⊆E.A \subseteq E.

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1 / 3

    1. Est-ce que l’ensemble {A,B,C}\{\text{A},\text{B},\text{C}\} est un sous-ensemble de l’ensemble {A,B,C,D,E,F}\{\text{A},\text{B},\text{C},\text{D},\text{E},\text{F}\} ?

    2. Est-ce que l’ensemble {1,2,4}\{1,2,4\} est un sous-ensemble de l’ensemble {1,2,3,5,6}\{1,2,3,5,6\} ?

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