fbsinverse.h

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#ifndef _BSInverse
#define _BSInverse

#include <assert.h>
#include "sfunctions.h"

class BSInverse : public Function1D
{
private:
        Function1D &_f;    // 1D function that maps (a,b] , 0 <= a < b <=1 , onto (0, infty)
                           // Note: f(a) may be +infty
                           //       f(b)=0
                           // f must be decreasing on (a,b]
        double _a, _b;     // (a,b] is the domain of f
        double _Tol;       // tolerance for the bisection method

public:
        BSInverse(Function1D &f, double a, double b, double Tol);

        virtual double operator()(double y, unsigned cmp) const;

        virtual ~BSInverse();

};

#endif

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