Class for a null matrix with only zero coefficients.

#include <TZeroMatrix.hh>

Inheritance diagram for TZeroMatrix< T_value >:

Public Member Functions
	TZeroMatrix (const size_t anrows, const size_t ancols)
	construct null matrix of size anrows × ancols

	TZeroMatrix (const TBlockCluster *bct=nullptr)
	construct null matrix with size defined by block cluster bct

virtual void	set_cluster (const TBlockCluster *bct)
	set block cluster of matrix

virtual void	set_size (const size_t nrows, const size_t ncols)
	directly set dimension of matrix

size_t	rows () const
	return number of rows in matrix

size_t	cols () const
	return number of columns in matrix

virtual bool	is_zero () const
	return true, if matrix is zero

virtual value_t	entry (const idx_t, const idx_t) const
	return matrix coefficient a_ij (real valued)

virtual void	scale (const value_t)
	compute this ≔ α·this

virtual void	mul_vec (const value_t alpha, const TVector< value_t > x, const value_t beta, TVector< value_t > y, const matop_t op=apply_normal) const
	compute y ≔ β·y + α·op(M)·x, with M = this

virtual void	add (const value_t alpha, const TMatrix< value_t > *matrix)
	compute this ≔ this + α · matrix

virtual void	transpose ()
	transpose matrix

virtual void	conjugate ()
	conjugate matrix coefficients

virtual void	truncate (const TTruncAcc &)
	truncate matrix to given accuracy (NOT YET IMPLEMENTED)

virtual void	read (TByteStream &s)
	read data from stream s and copy to matrix

virtual void	build (TByteStream &s)
	use data from stream s to build matrix

virtual void	write (TByteStream &s) const
	write data to stream s

virtual size_t	bs_size () const
	returns size of object in bytestream

virtual auto	create () const -> std::unique_ptr< TMatrix< value_t > >
	return matrix of same class (but no content)

virtual auto	copy () const -> std::unique_ptr< TMatrix< value_t > >
	return copy of matrix

virtual auto	copy_struct () const -> std::unique_ptr< TMatrix< value_t > >
	return structural copy of matrix

virtual void	copy_to (TMatrix< value_t > *A) const
	copy matrix into matrix A

virtual size_t	byte_size () const
	return size in bytes used by this object

Public Member Functions inherited from TMatrix< T_value >
	TMatrix ()
	construct zero sized matrix

	TMatrix (const TBlockCluster *bcl)
	construct matrix of size defined by block cluster bcl

	TMatrix (const TBlockIndexSet &bis)
	construct matrix of size defined by block index set bis

	TMatrix (const TMatrix< value_t > &A)
	copy constructor

virtual	~TMatrix ()
	dtor

int	id () const
	return ID

void	set_id (const int aid)
	set ID

virtual size_t	nrows (const matop_t op) const
	return number of rows of op(M)

virtual size_t	ncols (const matop_t op) const
	return number of columns of op(M)

TIndexSet	row_is () const
	return row index set

TIndexSet	col_is () const
	return column index set

TBlockIndexSet	block_is () const
	return block index set

TIndexSet	row_is (const matop_t op) const
	return row index set w.r.t. given matrix operation

TIndexSet	col_is (const matop_t op) const
	return row index set w.r.t. given matrix operation

TBlockIndexSet	block_is (const matop_t op) const
	return row index set w.r.t. given matrix operation

virtual idx_t	row_ofs () const
	return first index (number) in row

virtual idx_t	col_ofs () const
	return first index (number) in column

virtual void	set_ofs (const idx_t r, const idx_t c)
	set index set offsets

virtual void	set_block_is (const TBlockIndexSet &is)
	set block index set of matrix

bool	is_nonsym () const
	return true if matrix is unsymmetric

bool	is_symmetric () const
	return true if matrix is symmetric

bool	is_hermitian () const
	return true if matrix is hermitian

matform_t	form () const
	return matrix format

void	set_nonsym ()
	set matrix to be unsymmetric

void	set_symmetric ()
	set matrix to be symmetric

void	set_hermitian ()
	set matrix to be hermitian

virtual void	set_form (const matform_t f)
	set matrix format

virtual bool	is_blocked () const
	return true, if matrix is blocked

virtual bool	is_dense () const
	return true, if matrix is dense

virtual bool	is_self_adjoint () const
	return true, if operator is self adjoint

const TProcSet &	procs () const
	return matrix processor set

uint	nprocs () const
	return number of processors in local set

virtual void	set_procs (const TProcSet &ps, const recursion_type_t rec_type=nonrecursive)
	set processor set of matrix

bool	is_distributed () const
	return true if matrix is distributed

template<typename T_value_M >
void	copy_struct_from_all (const TMatrix< T_value_M > *M)

TUpdateAccumulator< value_t > &	accumulator ()
	access accumulator object

void	add_update (const TMatrix< value_t > *M, const TTruncAcc &acc)
	add update matrix

void	add_pending_direct (TDirectMatrixUpdate< value_t > *U)
	add update U to set of recursive pending updates

void	add_pending_recursive (TRecursiveMatrixUpdate< value_t > *U)
	add update U to set of recursive pending updates

virtual void	apply_updates (const TTruncAcc &acc, const recursion_type_t rec_type)

virtual bool	has_updates (const recursion_type_t recursion) const
	return true, if matrix has updates not yet applied

virtual bool	has_parent_updates (const recursion_type_t recursion) const
	return true, if parent matrix has updates not yet applied

const TBlockCluster *	cluster () const
	return corresponding block cluster of matrix

virtual void	set_cluster_force (const TBlockCluster *c)
	set block cluster of matrix (with forced setting of cluster variable)

virtual void	apply (const TVector< value_t > x, TVector< value_t > y, const matop_t op=apply_normal) const

virtual void	apply_add (const value_t alpha, const TVector< value_t > x, TVector< value_t > y, const matop_t op=apply_normal) const

virtual void	apply_add (const value_t alpha, const BLAS::Vector< value_t > &x, BLAS::Vector< value_t > &y, const matop_t op=apply_normal) const

virtual size_t	domain_dim () const
	return dimension of domain

virtual size_t	range_dim () const
	return dimension of range

virtual auto	domain_vector () const -> std::unique_ptr< TVector< value_t > >
	return vector in domain space

virtual auto	range_vector () const -> std::unique_ptr< TVector< value_t > >
	return vector in range space

virtual TMatrix< value_t > *	mul_right (const value_t alpha, const TMatrix< value_t > *B, const matop_t op_A, const matop_t op_B) const
	compute α·op(A)·op(B), with A = this

virtual TMatrix< value_t > *	mul_left (const value_t alpha, const TMatrix< value_t > *A, const matop_t op_A, const matop_t op_B) const
	compute α·op(A)·op(B), with B = this

virtual size_t	global_byte_size () const

virtual auto	copy (const TTruncAcc &acc, const bool coarsen=false) const -> std::unique_ptr< TMatrix< value_t > >
	return copy of matrix with accuracy acc and optional coarsening

virtual void	copy_from (const TMatrix< value_t > *A)
	copy data from matrix A

virtual void	copy_to (TMatrix< value_t > *A, const TTruncAcc &acc, const bool coarsen=false) const
	copy matrix into matrix A with accuracy acc and optional coarsening

virtual auto	row_vector () const -> std::unique_ptr< TVector< value_t > >
	return appropriate row vector object for matrix

virtual auto	col_vector () const -> std::unique_ptr< TVector< value_t > >
	return appropriate column vector object for matrix

virtual void	sum (const TProcSet &p, const uint pid, const uint nparts, TByteStream *bs, const TTruncAcc &acc)

virtual void	check_data () const
	test data for invalid values, e.g. INF and NAN

virtual void	print (const uint ofs=0) const
	print basic info about matrix to stdout

Public Member Functions inherited from TLinearOperator< T_value >
virtual bool	is_complex () const
	return true, if field type is complex valued

virtual bool	is_real () const
	return true, if field type is real valued

Public Member Functions inherited from TTypeInfo
virtual typeid_t	type () const =0
	return type ID of object

virtual bool	is_type (const typeid_t t) const
	return true if local object is of given type ID t

virtual std::string	typestr () const
	return string representation of type

Public Member Functions inherited from TLockable
TMutex &	mutex ()
	give access to internal mutex

void	lock ()
	lock local mutex

void	unlock ()
	unlock local mutex

size_t	byte_size () const
	return size in bytes used by this object

Public Member Functions