subadditive

English

Etymology

From sub- +‎ additive.

Adjective

subadditive (not comparable)

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 ${\displaystyle {\sqrt {a+b}}\leq {\sqrt {a}}+{\sqrt {b}}}$.

Antonyms

• superadditive

Related terms

• subadditivity

Further reading

• subadditive on Wikipedia.Wikipedia