Ivan Shishkin, Birch Grove

Ideal

Definition / General algebra / Stub

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An ideal of a commutative ring (R,+,×)(R,+,\times) is an abelian subgroup of (R,+,×)(R,+,\times) with the following stability condition : for all r∈Rr\in R and all a∈Aa\in A,  \;ra∈Ira\in I.

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