FeynCalc manual (development version)

Epsilon

Epsilon is (n4)(n-4), where nn is the space-time dimension.

Epsilon stands for a small positive number.

See also

Overview, Series2.

Examples

Epsilon

ε\varepsilon

Epsilon has no functional properties, but some upvalues are changed:

{Re[Epsilon] > -4, Re[Epsilon] > -3, Re[Epsilon] > -2, Re[Epsilon] > -1, Re[Epsilon] > 0}

{True,True,True,True,True}\{\text{True},\text{True},\text{True},\text{True},\text{True}\}