English Dictionary

idempotent

IPA（発音記号）

/aɪ.dəmˈpoʊ.tənt/

形容詞

比較不可

(mathematics, computing) (said of a function) Such that, when performed multiple times on the same subject, it has no further effect on its subject after the first time it is performed.

日本語の意味

冪等（べきとう）：数学や計算機科学において、ある操作や関数を対象に一度実施した後、再度同じ操作を行っても対象に変化が生じない性質。 / 同じ対象に複数回適用しても、初回以降の適用で効果が変わらないという性質を指す。

Ensure your API endpoint is idempotent so that repeated requests won't cause duplicate charges.

API エンドポイントが冪等性を持つように設計し、同じリクエストを複数回送っても二重請求が発生しないようにしてください。

意味（1）

(mathematics, computing) (said of a function) Such that, when performed multiple times on the same subject, it has no further effect on its subject after the first time it is performed.

A projection operator is idempotent.

意味（2）

(mathematics) (said of an element of an algebraic structure with a binary operation, such as a group or semigroup) Such that, when it operates on itself, the result is equal to itself.

Every finite semigroup has an idempotent element.

意味（3）

(mathematics) (said of a binary operation) Such that all of the distinct elements it can operate on are idempotent (in the sense given just above).

Since the AND logical operator is commutative, associative, and idempotent, it distributes with respect to itself.

意味（4）

(mathematics) (said of an algebraic structure) Having an idempotent operation (in the sense given above).