different between summand vs subadditive

English

Etymology

sum +? -and

Noun

summand (plural summands)

1. Something which is added or summed.

   In the expression 1+2=3, the summands are 1 and 2.

Synonyms

• addend

Hypernyms

• term

Translations

See also

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

English

Etymology

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