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Heaviside step function

Indicator function of positive numbers

The Heaviside step function, or the unit step function, usually denoted by H or ฮธ (but sometimes u, 1 or ๐Ÿ™), is a step function named after Oliver Heaviside, the value of which is zero for negative arguments and one for positive arguments. Different conventions concerning the value H(0) are in use.

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