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Summand vs Subadditive - What's the difference?

summand | subadditive |

As a noun summand

is something which is added or summed; for example in 1+2=3 the summands are 1 and 2 which form the sum, 3.

As an adjective subadditive is

such that the of a sum is at most the sum of the images of the summands.

summand

English

(Addition)

Noun

(en noun)
  • Something which is added or summed; for example in 1+2=3'' the summands are ''1'' and ''2'' which form the sum, ''3 .

    • See also

    * addition, summation: (augend) + (addend) = (summand) + (summand) = (sum, total) * subtraction: (minuend) ? (subtrahend) = (difference) * multiplication: (multiplier) × (multiplicand) = (factor) × (factor) = (product) * division: (dividend) ÷ (divisor) = (quotient), remainder left over if divisor does not divide dividend

    Synonyms

    * addend

    subadditive

    English

    Adjective

    (-)
  • (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 \sqrt{a+b}\le\sqrt a+\sqrt b.

    Antonyms

    * superadditive

    Related terms

    * subadditivity

    External links

    * ("subadditive" on Wikipedia)