IEVref:103-03-01ID:
Language:enStatus: Obsolete
Term: unit step function
Synonym1: Heaviside function
[Preferred]
Synonym2:
Synonym3:
Symbol: ε
Definition: function, zero for all negative values of the independent variable and equal to one for all positive values

NOTE 1 See Figure 1 below for a graphical representation of ε(t). The value ε(0) may remain undefined or may be defined according to the context.

NOTE 2 ε(xx0) denotes a unit step at the value x0 of the independent variable x.

NOTE 3 Notation H(x) is also used. Notation ϑ(t) is used for the unit step function of time. Notation ϒ(x) has also been used.

Figure 1 – Représentation graphique de ε(t)

Figure 1 – Graphical representation of ε(t)


Publication date:2009-12
Source
Replaces:
Internal notes:2015-09-29: Correction of epsilon to upright in the figure title. JGO

2017-06-02: Cleanup - Remove Attached Image 103-03-01en.gif
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