SmoothCutoffFunctions.h

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#include <vector>
 
namespace dftefe
{
  namespace atoms
  {
    double
    f1(const double x);
 
    double
    f1Der(const double x);
 
    double
    f2(const double x);
 
    double
    f2Der(const double x, const double tolerance);
 
    double
    Y(const double x, const double r, const double d);
 
    double
    YDer(const double x, const double r, const double d);
 
    double
    smoothCutoffValue(const double x, const double r, const double d);
 
    double
    smoothCutoffDerivative(const double x,
                           const double r,
                           const double d,
                           const double tolerance);
 
  } // namespace atoms
} // namespace dftefe