Ivan Shishkin, Birch Grove

Sous-ensemble propre

Definition / Mathematical formalism /

This translation may be outdated. Its source text has changed since revision 410.

Also known as: partie propre, sous-ensemble strictement inclus

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Un sous-ensemble AA d’un ensemble BB est dit propre s’il est différent BB. Autrement dit, AA est inclus dans BB mais pas le contraire ; AA est strictement inclus dans BB.

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