
A2.5 Ox exported mathematics functions 49
DErf, DExpInt, DExpInte, DExpInt1
double DErf(double x);
double DExpInt(double x);
double DExpInte(double x);
double DExpInt1(double x);
Return value
DErf returns the error function erf(x).
DExpInt returns the exponential integral Ei(x).
DExpInte returns the exponential integral exp(−x)Ei(x).
DExpInt1 returns the exponential integral E1(x).
DGamma, DGammaFunc
double DGamma(double z);
double DGammaFunc(double dX, double dR);
Return value
DGamma returns the complete gamma function Γ(z).
DGammaFunc returns the incomplete gamma function G
x
(r).
DGetInvertEps
double DGetInvertEps(void);
double DGetInvertEpsNorm(MATRIX mA, int cA);
Return value
DGetInvertEps returns inversion epsilon,
inv
,seeSetInvertEps.
DGetInvertEpsNorm returns
inv
||A||
∞
.
DLogGamma
double DLogGamma(double dA);
Return value
Returns the logarithm of the gamma function.
DPolyGamma
double DPolyGamma(double dA, int n);
Return value
Returns the derivatives of the loggamma function; n =0is first derivative:
digamma function, and so on.
DProb...
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