truncation

Auxiliary functions for truncation . More...

Data Structures
struct	_truncmode
	Define different strategies used by various truncation and compression algorithms for hmatrices and h2matrices. More...

Typedefs
typedef struct _truncmode	truncmode
	Abbreviation for struct _truncmode .
typedef truncmode *	ptruncmode
	Abbreviation for a pointer to a truncmode object.
typedef const truncmode *	pctruncmode
	Abbreviation for a pointer to a constant truncmode object.

Functions
ptruncmode	new_truncmode ()
	Create a new truncmode object without any further initializations. More...
void	del_truncmode (ptruncmode tm)
	Free storage for truncmode object. More...
ptruncmode	new_releucl_truncmode ()
	Create a new truncmode object with relative euclidean error norm. More...
ptruncmode	new_relfrob_truncmode ()
	Create a new truncmode object with relative frobenius error norm. More...
ptruncmode	new_blockreleucl_truncmode ()
	Create a new truncmode object with block relative euclidean error norm. More...
ptruncmode	new_blockrelfrob_truncmode ()
	Create a new truncmode object with block relative frobenius error norm. More...
ptruncmode	new_abseucl_truncmode ()
	Create a new truncmode object with absolute euclidean error norm. More...
uint	findrank_truncmode (pctruncmode tm, real eps, pcrealavector sigma)
	Determine new rank for truncation routines. More...

Detailed Description

Auxiliary functions for truncation .

Function Documentation

void del_truncmode

(

ptruncmode

tm

)

Free storage for truncmode object.

Parameters

tm	Truncmode to be deleted.

uint findrank_truncmode	(	pctruncmode	tm,
		real	eps,
		pcrealavector	sigma
	)

Determine new rank for truncation routines.

Depending on the truncation mode given by tm, a truncation accuracy given by eps and the singular values given by the avector sigma the function returns the new suitable rank.

Parameters

tm	Truncation strategy
eps	Trucation accuracy
sigma	Realavector containing the singular values.

Returns

Returns the new suitable rank.

ptruncmode new_abseucl_truncmode

(

)

Create a new truncmode object with absolute euclidean error norm.

Returns

A new truncmode object is returned using absolute euclidean error norm.

ptruncmode new_blockreleucl_truncmode

(

)

Create a new truncmode object with block relative euclidean error norm.

Returns

A new truncmode object is returned using block relative euclidean error norm.

ptruncmode new_blockrelfrob_truncmode

(

)

Create a new truncmode object with block relative frobenius error norm.

Returns

A new truncmode object is returned using block relative frobenius error norm.

ptruncmode new_releucl_truncmode

(

)

Create a new truncmode object with relative euclidean error norm.

Returns

A new truncmode object is returned using relative euclidean error norm.

ptruncmode new_relfrob_truncmode

(

)

Create a new truncmode object with relative frobenius error norm.

Returns

A new truncmode object is returned using relative frobenius error norm.

ptruncmode new_truncmode

(

)

Create a new truncmode object without any further initializations.

Returns

A new, non specific truncmode object is returned.