Mathc initiation/Fichiers h : c39fb

Sommaire

Installer ce fichier dans votre répertoire de travail.

	kurv2d.h

/* --------------------------------- */
/* save as  kurv2d.h                 */
/* --------------------------------- */
double K_y_2d(
double (*P_f)(double x),
double x
)
{
double   a = fx_x((*P_f),x,H);
 
 return(fabs(fx_xx((*P_f),x,H))
                   /
             pow(1+a*a,3./2.));
}
/* --------------------------------- */
double h_y_2d(
double (*P_f)(double x),
double x
)
{
double a = fx_x((*P_f),x,H);

 return(x - ( ( a*(1+a*a) )
              /
        fx_xx((*P_f),x,H)));
}
/* --------------------------------- */
double k_y_2d(
double (*P_f)(double x),
double x
)
{
double a = fx_x((*P_f),x,H);

 return((*P_f)(x) + (    (1+a*a)
                  /
           fx_xx((*P_f),x,H)));
}
/* --------------------------------- */
/* --------------------------------- */