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superadditive function |
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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 allxandyin its domain. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | n)](x) [greater than or equal to] 0 for x [member of] I and n [greater than or equal to] 0, a function f(x) is said to be star-shaped on (0, [infinity]) if f([alpha]x) [less than or equal to] [alpha]f(x) for x [member of] (0, [infinity]) if f(x + y) [greater than or equal to] f(x) + f(y) for all x, y > 0, and a function f is said to be subadditive if -f is superadditive. If there is no superadditive interaction (null hypothesis), RERI equals 0. Thus, the result has arguably been superadditive, with the total contribution to the economy's productive powers greater than the sum of the contributions for which each was individually responsible. |
Superadditive |
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