Last Updated：2025/11/24

(of a function) Such that the image of a sum is at most the sum of the images of the summands.

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subadditive

Source Word

subadditive

not-comparable of a function

(of a function) Such that the image of a sum is at most the sum of the images of the summands.

Japanese Meaning

（関数に関する性質）任意の２つの入力 x, y に対して、関数の値 f(x+y) がそれぞれの値 f(x) と f(y) の和を超えない性質、すなわち f(x+y) ≤ f(x) + f(y) となる性質を指す。

The economist modeled the cost function as subadditive to account for economies of scale.

その経済学者は規模の経済を説明するために、コスト関数が和の値が各項の値の和以下になる性質を持つようにモデル化した。

Sense（1）

(of a function) Such that the image of a sum is at most the sum of the images of the summands.

The square-root function is subadditive under addition because √<√a+√b.