XLPack 7.0
XLPack Numerical Library (Excel VBA) Reference Manual
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◆ Gegenbauerd1_sub()

Sub Gegenbauerd1_sub ( Ret As  Double,
N As  Long,
Lambda As  Double,
X As  Double,
Optional Info As  Long 
)

First derivative of Gegenbauer polynomial Cn(λ)(x) (Subroutine version)

Purpose
Computes the first derivative of the Gegenbauer polynomial.
Parameters
[out]RetThe first derivative of Gegenbauer polynomial Cn(λ)(x).
[in]NDegree of polynomial n. (N >= 0)
[in]LambdaParameter λ.
[in]XArgument x.
[out]Info(Optional)
= 0: Successful exit.
= -1: The argument N had an illegal value. (N < 0)
= 1: Floating point range error.
Reference
boost/math/special_functions