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BUILT-IN MATHEMATICA SYMBOL
UnitStep
UnitStep[x]
represents the unit step function, equal to 0 for 
and 1 for 
.
UnitStep[x1, x2, ...]
represents the multidimensional unit step function which is 1 only if none of the 
are negative.
Details
- Some transformations are done automatically when UnitStep appears in a product of terms.
- UnitStep provides a convenient way to represent piecewise continuous functions.
- UnitStep has attribute Orderless.
- For exact numeric quantities, UnitStep internally uses numerical approximations to establish its result. This process can be affected by the setting of the global variable $MaxExtraPrecision.
- UnitStep[] is
.
New in 4
