#include <Tensor.h>

Inheritance diagram for CheMPS2::Tensor:

Public Member Functions
virtual int	gNKappa () const =0
	Get the number of tensor blocks. More...

virtual double *	gStorage ()=0
	Get the pointer to the storage. More...

virtual int	gKappa (const int N1, const int TwoS1, const int I1, const int N2, const int TwoS2, const int I2) const =0
	Get the index corresponding to a certain tensor block. More...

virtual int	gKappa2index (const int kappa) const =0
	Get the storage jump corresponding to a certain tensor block. More...

virtual double *	gStorage (const int N1, const int TwoS1, const int I1, const int N2, const int TwoS2, const int I2)=0
	Get the pointer to the storage of a certain tensor block. More...

virtual int	gIndex () const =0
	Get the location index. More...

Protected Attributes
int	index
	Index of the Tensor object. For TensorT: a site index; for other tensors: a boundary index.

double *	storage
	The actual variables. Tensor block kappa begins at storage+kappa2index[kappa] and ends at storage+kappa2index[kappa+1].

int	nKappa
	Number of Tensor blocks.

int *	kappa2index
	kappa2index[kappa] indicates the start of tensor block kappa in storage. kappa2index[nKappa] gives the size of storage.

Detailed Description

Pure virtual Tensor class.

Author: Sebastian Wouters sebas.nosp@m.tian.nosp@m.woute.nosp@m.rs@g.nosp@m.mail..nosp@m.com

Date: February 15, 2013

The Tensor class defines parameters and functions which all Tensors must have.

Definition at line 31 of file Tensor.h.

Member Function Documentation

virtual int CheMPS2::Tensor::gIndex ( ) const

pure virtual

Get the location index.

Returns: the index

Implemented in CheMPS2::TensorOperator, and CheMPS2::TensorT.

virtual int CheMPS2::Tensor::gKappa	(	const int	N1,
		const int	TwoS1,
		const int	I1,
		const int	N2,
		const int	TwoS2,
		const int	I2
	)		const

pure virtual

Get the index corresponding to a certain tensor block.

Parameters

N1	The left or up particle number sector
TwoS1	The left or up spin symmetry sector
I1	The left or up irrep sector
N2	The right or down particle number sector
TwoS2	The right or down spin symmetry sector
I2	The right or down irrep sector

Returns: The kappa corresponding to the input parameters; -1 means no such block

Implemented in CheMPS2::TensorOperator, and CheMPS2::TensorT.

virtual int CheMPS2::Tensor::gKappa2index ( const int kappa ) const

pure virtual

Get the storage jump corresponding to a certain tensor block.

Parameters

kappa The symmetry block

Returns: kappa2index[ kappa ], the memory jumper to a certain block

Implemented in CheMPS2::TensorOperator, and CheMPS2::TensorT.

virtual int CheMPS2::Tensor::gNKappa ( ) const

pure virtual

Get the number of tensor blocks.

return The number of tensor blocks

Implemented in CheMPS2::TensorOperator, and CheMPS2::TensorT.

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virtual double* CheMPS2::Tensor::gStorage ( )

pure virtual

Get the pointer to the storage.

return pointer to the storage

Implemented in CheMPS2::TensorOperator, and CheMPS2::TensorT.

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virtual double* CheMPS2::Tensor::gStorage	(	const int	N1,
		const int	TwoS1,
		const int	I1,
		const int	N2,
		const int	TwoS2,
		const int	I2
	)

pure virtual

Get the pointer to the storage of a certain tensor block.

Parameters

N1	The left or up particle number sector
TwoS1	The left or up spin symmetry sector
I1	The left or up irrep sector
N2	The right or down particle number sector
TwoS2	The right or down spin symmetry sector
I2	The right or down irrep sector

Returns: Pointer to the storage of the specified tensor block; NULL means no such block

Implemented in CheMPS2::TensorOperator, and CheMPS2::TensorT.

The documentation for this class was generated from the following file:

Tensor.h

Public Member Functions

Protected Attributes

Detailed Description

Member Function Documentation