flexiblesusy::runge_kutta Namespace Reference

Namespaces
namespace	anonymous_namespace{rk.hpp}

Classes
class	Basic_rk_integrator
	Class for integrating a system of first order ODEs. More...
class	Basic_rk_stepper
	Class to carry out a 5th order Runge-Kutta step. More...
class	RKF_integrator
	Class for integrating ODEs using a Runge-Kutta-Fehlberg method. More...

Functions
template<typename ArrayType , typename Derivs , typename Stepper = decltype(runge_kutta::odeStepper<ArrayType,Derivs>)>
void	integrateOdes (ArrayType &ystart, double from, double to, double eps, double h1, double hmin, Derivs derivs, Stepper rkqs=runge_kutta::odeStepper< ArrayType, Derivs >, int max_steps=400)
	Organises integration of 1st order system of ODEs.
template<typename ArrayType , typename Derivs >
double	odeStepper (ArrayType &y, const ArrayType &dydx, double &x, double htry, double eps, const ArrayType &yscal, Derivs derivs, int &max_step_dir)
	organises the variable step-size for Runge-Kutta evolution
template<typename ArrayType , typename Derivs >
void	rungeKuttaStep (const ArrayType &y, const ArrayType &dydx, double x, double h, ArrayType &yout, ArrayType &yerr, Derivs derivs)

Function Documentation

integrateOdes()

template<typename ArrayType , typename Derivs , typename Stepper = decltype(runge_kutta::odeStepper<ArrayType,Derivs>)>

void flexiblesusy::runge_kutta::integrateOdes	(	ArrayType &	ystart,
		double	from,
		double	to,
		double	eps,
		double	h1,
		double	hmin,
		Derivs	derivs,
		Stepper	rkqs = runge_kutta::odeStepper<ArrayType,Derivs>,
		int	max_steps = 400
	)

Organises integration of 1st order system of ODEs.

Definition at line 159 of file rk.hpp.

References ERROR, and flexiblesusy::sign().

Referenced by flexiblesusy::Lattice_RKRGE::evolve_to(), and flexiblesusy::runge_kutta::Basic_rk_integrator< StateType, Derivs, Stepper >::operator()().

odeStepper()

template<typename ArrayType , typename Derivs >

double flexiblesusy::runge_kutta::odeStepper	(	ArrayType &	y,
		const ArrayType &	dydx,
		double &	x,
		double	htry,
		double	eps,
		const ArrayType &	yscal,
		Derivs	derivs,
		int &	max_step_dir
	)

organises the variable step-size for Runge-Kutta evolution

Definition at line 108 of file rk.hpp.

References ERROR, and rungeKuttaStep().

Referenced by flexiblesusy::Lattice_RKRGE::evolve_to(), and flexiblesusy::runge_kutta::Basic_rk_stepper< StateType, Derivs >::step().

rungeKuttaStep()

template<typename ArrayType , typename Derivs >

void flexiblesusy::runge_kutta::rungeKuttaStep	(	const ArrayType &	y,
		const ArrayType &	dydx,
		double	x,
		double	h,
		ArrayType &	yout,
		ArrayType &	yerr,
		Derivs	derivs
	)

A single step of Runge Kutta (5th order), input: y and dydx (derivative of y), x is independent variable. yout is value after step. derivs is a user-supplied function

Definition at line 53 of file rk.hpp.

Referenced by odeStepper(), and flexiblesusy::runge_kutta::Basic_rk_stepper< StateType, Derivs >::runge_kutta_step().