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CekstvSwitch Class Template Reference

#include <cekstv.h>

List of all members.

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Detailed Description

template<class Field>
class LinBox::CekstvSwitch< Field >

Butterfly switch object from preconditioner paper. This is a switch predicate object that is applied to two references to elements to switch them as needed by the \Ref{Butterfly Switching Network BlackBox Matrix Object} following the exchange matrix introduced in "Efficient Matrix Preconditioners for Black Box Linear Algebra" by Chen, Eberly, Kaltofen, Saunders, Turner, and Villard. This class is templatized by the field in which the arithmetic is done.

Public Types
typedef Field::Element	Element
	Typedef.
typedef CekstvSwitchFactory< Field >	Factory
Public Methods
	CekstvSwitch (const typename Field::Element &a)
	~CekstvSwitch ()
bool	apply (const Field &F, Element &x, Element &y) const
bool	applyTranspose (const Field &F, Element &x, Element &y) const

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Member Typedef Documentation

typedef Field::Element Element

Typedef.

typedef CekstvSwitchFactory<Field> Factory

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Constructor & Destructor Documentation

CekstvSwitch (  const typename Field::Element &    a )  [inline]

Constructor from a field and a field element. Parameters: F  field in which arithmetic is done switches  vector of switches

~CekstvSwitch (    )  [inline]

Destructor.

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Member Function Documentation

bool apply (  const Field &    F, Element &    x, Element &    y )  const

Apply switch function. Switches the elements in references according to the exchange matrix introduced in "Efficient Matrix Preconditioners for Black Box Linear Algebra" by Chen, Eberly, Kaltofen, Saunders, Turner, and Villard and the current field element specified in the switch object. Returns: bool true if swapped, false otherwise Parameters: x  reference to first element to be switched y  reference to second element to be switched

bool applyTranspose (  const Field &    F, Element &    x, Element &    y )  const

Apply switch transpose function. Switches the elements in references according to the transpose of the exchange matrix introduced in "Efficient Matrix Preconditioners for Black Box Linear Algebra" by Chen, Eberly, Kaltofen, Saunders, Turner, and Villard and the current field element specified in the switch object. Returns: bool true if swapped, false otherwise Parameters: x  reference to first element to be switched y  reference to second element to be switched

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