source: sans/XOP_Dev/SANSAnalysis/lib/libTwoPhase.h

// header for TwoPhaseFit.c

//function prototypes
/* IGOR Fit Functions */
double TeubnerStreyModel(double dp[], double q);
double Power_Law_Model(double dp[], double q);
double Peak_Lorentz_Model(double dp[], double q);
double Peak_Gauss_Model(double dp[], double q);
double Lorentz_Model(double dp[], double q);
double Fractal(double dp[], double q);
double DAB_Model(double dp[], double q);
double OneLevel(double dp[], double q);
double TwoLevel(double dp[], double q);
double ThreeLevel(double dp[], double q);
double FourLevel(double dp[], double q);
double BroadPeak(double dp[], double q);
double CorrLength(double dp[], double q);
double TwoLorentzian(double dp[], double q);
double TwoPowerLaw(double dp[], double q);
double PolyGaussCoil(double dp[], double q);
double GaussLorentzGel(double dp[], double q);
double GaussianShell(double dp[], double q);


/* internal functions */
static double gammln(double xx);