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summable

[suhm-uh-buhl]

adjective Mathematics.

capable of being added.

(of an infinite series, especially a divergent one) capable of having a sum assigned to it by a method other than the usual one of taking the limit of successive partial sums.

(of a function) possessing a finite Lebesgue integral.

Origin:
1775–85; sum + -able

Related forms

sum·ma·bil·i·ty, noun

un·sum·ma·ble, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Summable is always a great word to know.

So is pi. Does it mean:

the letter used as the symbol for the ratio of the circumference of a circle to its diameter, or the ratio itself: 3.141592+

the third power of a quantity such as a cubed = a?a?a

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