SpecialFunctionsIncompleteGamma Method

The incomplete gamma integral. Both arguments must be positive.

Namespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.4

Syntax

public static double IncompleteGamma(
	double a,
	double x
)

Public Shared Function IncompleteGamma ( 
	a As Double,
	x As Double
) As Double

public:
static double IncompleteGamma(
	double a, 
	double x
)

static member IncompleteGamma : 
        a : float * 
        x : float -> float

Parameters

a Double: A parameter describing the incomplete gamma function.
x Double: A point on the x-axis.

Return Value

Double
The integral from 0 to x of (t^(a-1) * e^-t)dt.

Exceptions

Exception	Condition
InvalidArgumentException	Parameter a must be non-negative and x must be positive.

Remarks

Some math packages define our complemented incomplete gamma function as the incomplete gamma function. In other words the complemented and uncomplemented versions are reversed; for example as in the wolfram alpha computational engine.

Reference

SpecialFunctions Class

CenterSpace.NMath.Core Namespace