| SpecialFunctionsEi Method |
Exponential integral.
Namespace: CenterSpace.NMath.CoreAssembly: NMath (in NMath.dll) Version: 7.4
Syntax public static double Ei(
double x
)
Public Shared Function Ei (
x As Double
) As Double
public:
static double Ei(
double x
)
static member Ei :
x : float -> float
Parameters
- x Double
- Any real non-negative number.
Return Value
DoubleThe exponential integral at x.
Exceptions Remarks The exponential integral is,
+inf
- -t
| e
Ei(x) = | --- dt
| t
-
-x
Note that exponential integral has a value of negative infinity at x = 0. The
exponential integral is closely related to the incomplete gamma function.
See Also