virtual Val_domain der_r(const Val_domain &) const
Compute the radial derivative of a scalar field.
virtual Val_domain mult_r(const Val_domain &) const
Multiplication by .
virtual Val_domain div_r(const Val_domain &) const
Division by .
double alpha
Relates the numerical to the physical radii.
Val_domain const & get_radius() const
Returns the generalized radius.
Class for storing the basis of decompositions of a field and its values on both the configuration and...
Base_spectral base
Spectral basis of the field.
Val_domain der_var(int i) const
Computes the derivative with respect to a numerical coordinate.