DmrgExternal.h File Reference

#include "symmetry/qarray.h"

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Classes
struct	std::hash< std::array< int, N > >
struct	std::hash< std::array< qarray< Nq >, Nlegs > >
struct	std::hash< std::tuple< size_t, size_t, size_t, qarray< Nq >, qarray< Nq > > >
struct	std::hash< std::pair< qarray< Nq >, size_t > >
struct	std::hash< std::array< size_t, 2 > >
struct	std::hash< qarray< Nq > >

Namespaces
namespace	std

Macros
#define	POSMOD_FUNCTION

Typedefs
typedef boost::rational< int >	frac

Functions
template<int N>
int	posmod (int x)
int	posmod (int x, int N)
std::string	print_frac_nice (frac r)
template<typename MatrixTypeA , typename MatrixTypeB >
size_t	mult_cost (const MatrixTypeA &A, const MatrixTypeB &B)
template<typename MatrixTypeA , typename MatrixTypeB , typename MatrixTypeC >
std::vector< size_t >	mult_cost (const MatrixTypeA &A, const MatrixTypeB &B, const MatrixTypeC &C)
template<typename MatrixTypeA , typename MatrixTypeB , typename MatrixTypeC , typename MatrixTypeD >
std::vector< size_t >	mult_cost (const MatrixTypeA &A, const MatrixTypeB &B, const MatrixTypeC &C, const MatrixTypeD &D)
template<typename MatrixType >
void	print_size (const MatrixType &M, string label)
template<typename MatrixTypeA , typename MatrixTypeB , typename MatrixTypeC , typename MatrixTypeR , typename Scalar >
void	optimal_multiply (Scalar alpha, const MatrixTypeA &A, const MatrixTypeB &B, const MatrixTypeC &C, MatrixTypeR &result, bool DEBUG=false)
template<typename MatrixTypeA , typename MatrixTypeB , typename MatrixTypeC , typename MatrixTypeD , typename MatrixTypeR , typename Scalar >
void	optimal_multiply (Scalar alpha, const MatrixTypeA &A, const MatrixTypeB &B, const MatrixTypeC &C, const MatrixTypeD &D, MatrixTypeR &result, bool DEBUG=false)
double	stagger (int i)
template<typename Scalar >
Scalar	localSumTrivial (int i)
double	calc_S_from_SSp1 (double x)
int	closest_int (double x, int min, int max)

Macro Definition Documentation

POSMOD_FUNCTION

#define POSMOD_FUNCTION

Calculates mod N ensuring the result is positive for positive N

Definition at line 18 of file DmrgExternal.h.

Typedef Documentation

frac

typedef boost::rational<int> frac

Definition at line 11 of file DmrgExternal.h.

Function Documentation

calc_S_from_SSp1()

double calc_S_from_SSp1

(

double

x

)

Solves the quadratic equation Stot*(Stot+1) = x, where x is obtained numerically and Stot is required

Definition at line 283 of file DmrgExternal.h.

closest_int()

int closest_int	(	double	x,
		int	min,
		int	max
	)

Definition at line 288 of file DmrgExternal.h.

localSumTrivial()

template<typename Scalar >

Scalar localSumTrivial

(

int

i

)

Dummy weight function for sums of local operators.

Definition at line 275 of file DmrgExternal.h.

mult_cost() [1/3]

template<typename MatrixTypeA , typename MatrixTypeB >

size_t mult_cost	(	const MatrixTypeA &	A,
		const MatrixTypeB &	B
	)

Cost to multiply 2 matrices.

Definition at line 142 of file DmrgExternal.h.

mult_cost() [2/3]

template<typename MatrixTypeA , typename MatrixTypeB , typename MatrixTypeC >

std::vector< size_t > mult_cost	(	const MatrixTypeA &	A,
		const MatrixTypeB &	B,
		const MatrixTypeC &	C
	)

Cost to multiply 3 matrices in 2 possible ways.

Definition at line 149 of file DmrgExternal.h.

mult_cost() [3/3]

template<typename MatrixTypeA , typename MatrixTypeB , typename MatrixTypeC , typename MatrixTypeD >

std::vector< size_t > mult_cost	(	const MatrixTypeA &	A,
		const MatrixTypeB &	B,
		const MatrixTypeC &	C,
		const MatrixTypeD &	D
	)

Cost to multiply 4 matrices in 5 possible ways.

Definition at line 163 of file DmrgExternal.h.

optimal_multiply() [1/2]

template<typename MatrixTypeA , typename MatrixTypeB , typename MatrixTypeC , typename MatrixTypeD , typename MatrixTypeR , typename Scalar >

void optimal_multiply	(	Scalar	alpha,
		const MatrixTypeA &	A,
		const MatrixTypeB &	B,
		const MatrixTypeC &	C,
		const MatrixTypeD &	D,
		MatrixTypeR &	result,
		bool	DEBUG = false
	)

Multiplies 4 matrices by using the optimal order of operations.

Definition at line 219 of file DmrgExternal.h.

optimal_multiply() [2/2]

template<typename MatrixTypeA , typename MatrixTypeB , typename MatrixTypeC , typename MatrixTypeR , typename Scalar >

void optimal_multiply	(	Scalar	alpha,
		const MatrixTypeA &	A,
		const MatrixTypeB &	B,
		const MatrixTypeC &	C,
		MatrixTypeR &	result,
		bool	DEBUG = false
	)

Multiplies 3 matrices by using the optimal order of operations.

Definition at line 191 of file DmrgExternal.h.

posmod() [1/2]

template<int N>

int posmod ( int  x )

inline

Definition at line 20 of file DmrgExternal.h.

posmod() [2/2]

int posmod ( int  x, int  N  )

inline

Definition at line 25 of file DmrgExternal.h.

print_frac_nice()

std::string print_frac_nice

(

frac

r

)

Prints a boost fraction in such a way, that a "1" in the denominator is omitted.

Definition at line 32 of file DmrgExternal.h.

print_size()

template<typename MatrixType >

void print_size ( const MatrixType &  M, string  label  )

inline

Definition at line 184 of file DmrgExternal.h.

stagger()

double stagger ( int  i )

inline

Function to realize staggered fields.

Definition at line 268 of file DmrgExternal.h.