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Dif Class Template Reference
[linbox/blackbox]

#include <dif.h>

Inheritance diagram for Dif:

List of all members.

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Detailed Description

template<class Blackbox1, class Blackbox2>
class LinBox::Dif< Blackbox1, Blackbox2 >

Blackbox of a difference: C := A - B, i.e. Cx = Ax - Bx.

{\bf Template parameters:} Field is the class of the entry domain, Vector is a LinBox dense or sparse vector of field elements class.

Public Types
typedef Blackbox1::Field	Field
typedef Blackbox1::Element	Element
Public Methods
	Dif (const Blackbox1 &A, const Blackbox2 &B)
	Dif (const Blackbox1 *A_ptr, const Blackbox2 *B_ptr)
	Dif (const Dif< Blackbox1, Blackbox2 > &M)
	~Dif (void)
	Destructor.
template<class OutVector, class InVector> OutVector &	apply (OutVector &y, const InVector &x) const
template<class OutVector, class InVector> OutVector &	applyTranspose (OutVector &y, const InVector &x) const
size_t	rowdim (void) const
size_t	coldim (void) const
const Field &	field () const

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Member Typedef Documentation

typedef Blackbox1::Element Element

typedef Blackbox1::Field Field

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Constructor & Destructor Documentation

Dif (  const Blackbox1 &    A, const Blackbox2 &    B )  [inline]

Build this as A - B from blackboxes A, B. A and B must have the same shape and be over the same field. Their data is not copied. A subsequent change to one of them also changes this difference.

Dif (  const Blackbox1 *    A_ptr, const Blackbox2 *    B_ptr )  [inline]

Build this as A - B from blackbox pointers A_ptr, B_ptr. The two matrices must have the same shape and be over the same field. Their data {\it is} copied. I don't know why.

Dif (  const Dif< Blackbox1, Blackbox2 > &    M )  [inline]

Makes a deep copy. Creates new black box objects in dynamic memory. Parameters: M  constant reference to compose black box matrix

~Dif (  void    )  [inline]

Destructor.

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Member Function Documentation

OutVector& apply (  OutVector &    y, const InVector &    x )  const [inline]

Application of BlackBox matrix. y= (A+B)*x. Requires one vector conforming to the \Ref{LinBox} vector archetype. Required by abstract base class. Returns: reference to vector y containing output. Parameters: x  constant reference to vector to contain input

OutVector& applyTranspose (  OutVector &    y, const InVector &    x )  const [inline]

Application of BlackBox matrix transpose. y= transpose(A+B)*x. Requires one vector conforming to the \Ref{LinBox} vector archetype. Required by abstract base class. Returns: reference to vector y containing output. Parameters: x  constant reference to vector to contain input

size_t coldim (  void    )  const [inline]

Retreive column dimensions of BlackBox matrix. Required by abstract base class. Returns: integer number of columns of black box matrix.

const Field& field (    )  const [inline]

size_t rowdim (  void    )  const [inline]

Retreive row dimensions of BlackBox matrix. This may be needed for applying preconditioners. Required by abstract base class. Returns: integer number of rows of black box matrix.

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