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Heaviside unit function

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noun Mathematics.

the function that is zero for any number less than zero and that is 1 for any number greater than or equal to zero.

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The rainy weather could not ________ my elated spirits on my graduation day.

Origin of Heaviside unit function

First recorded in 1935–40; named after O. Heaviside
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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