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.

QUIZ

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Question 1 of 9

Which of the following nouns has an irregular plural form?

Origin of Heaviside unit function

First recorded in 1935–40; named after O. Heaviside

“Stay in formation,” a sergeant from the ceremonial unit said over a public address system to the cops along the street.
Funeral Protest Is Too Much for NYPD Union Boss|Michael Daly|January 5, 2015|DAILY BEAST
My father was in an intelligence unit for the U.S. Navy, as he had been in World War II.
The Story Behind Lee Marvin’s Liberty Valance Smile|Robert Ward|January 3, 2015|DAILY BEAST
Bitcoin began 2013 with a roaring price of $770 per unit, and businesses right and left were converting to the ethereal product.
You Were Wrong About Miley & Bitcoin: 2014’s Failed Predictions|Nina Strochlic|December 31, 2014|DAILY BEAST
They then become members of the ultra elite Unit 121, granted premium housing and a well-stocked cupboard.
Inside the ‘Surprisingly Great’ North Korean Hacker Hotel|Michael Daly|December 20, 2014|DAILY BEAST

The unit is used to attack foreign networks, and either it or a sister organization was involved in the Sony hack.
U.S. Should Make North Korea Pay for Sony Hack|Gordon G. Chang|December 18, 2014|DAILY BEAST
To prevent intruders or extruders from withdrawing his mind from the text, he exercises the Inhibitory function of the Attention.
Assimilative Memory|Marcus Dwight Larrowe (AKA Prof. A. Loisette)
Little girls perhaps represent the attractive function of adornment: they like to be thought pretty.
Children's Ways|James Sully
As a fighting unit they are on their last legs and when they will be set upon their feet again Lord K. knows.
Gallipoli Diary, Volume I|Ian Hamilton
This is hardly a function—parties even in the big political country-houses are more or less informal.
Ancestors|Gertrude Atherton
No definite proof of this position has, however, as yet been adduced, and the function of the compound is entirely unknown.
Elements of Agricultural Chemistry|Thomas Anderson