superadditive function

superadditive function

[¦sü·pər‚ad·əd·iv ′fəŋk·shən]
(mathematics)
A function ƒ such that ƒ(x + y) is greater than or equal to ƒ(x) + ƒ(y) for all x and y in its domain.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.