35 #ifndef _BLAZE_MATH_EXPRESSIONS_SMATDMATSCHUREXPR_H_ 36 #define _BLAZE_MATH_EXPRESSIONS_SMATDMATSCHUREXPR_H_ 99 template<
typename MT1
101 class SMatDMatSchurExpr
102 :
public SchurExpr< SparseMatrix< SMatDMatSchurExpr<MT1,MT2>, false > >
103 ,
private Computation
122 static constexpr
bool returnExpr = ( !IsTemporary_v<RN1> && !IsTemporary_v<RN2> );
136 static constexpr
bool useAssign = ( RequiresEvaluation_v<MT1> || RequiresEvaluation_v<MT2> );
139 template<
typename MT >
141 static constexpr
bool UseAssign_v =
useAssign;
255 return left_->index();
344 if( i >=
lhs_.rows() ) {
347 if( j >=
lhs_.columns() ) {
381 inline size_t rows() const noexcept {
392 return lhs_.columns();
402 return lhs_.nonZeros();
413 return lhs_.nonZeros(i);
482 template<
typename T >
483 inline bool canAlias(
const T* alias )
const noexcept {
484 return (
lhs_.canAlias( alias ) ||
rhs_.isAliased( alias ) );
494 template<
typename T >
495 inline bool isAliased(
const T* alias )
const noexcept {
496 return (
lhs_.isAliased( alias ) ||
rhs_.isAliased( alias ) );
518 template<
typename MT
538 for(
size_t i=0UL; i<(~lhs).
rows(); ++i ) {
539 for(
auto element=A.begin(i); element!=A.end(i); ++element )
540 (~lhs)(i,element->index()) = element->value() * B(i,element->index());
558 template<
typename MT >
578 (~lhs).reserve( A.nonZeros() );
581 for(
size_t i=0UL; i<(~lhs).
rows(); ++i ) {
582 for(
auto element=A.begin(i); element!=A.end(i); ++element )
583 (~lhs).append( i, element->index(), element->value() * B(i,element->index()) );
584 (~lhs).finalize( i );
603 template<
typename MT >
604 friend inline auto assign( SparseMatrix<MT,true>& lhs,
const SMatDMatSchurExpr& rhs )
605 -> EnableIf_t< UseAssign_v<MT> >
622 const size_t m( rhs.rows() );
623 const size_t n( rhs.columns() );
626 std::vector<size_t> nonzeros( n, 0UL );
627 for(
size_t i=0UL; i<m; ++i ) {
628 const auto lend( A.end(i) );
629 for(
auto l=A.begin(i); l!=lend; ++l ) {
630 ++nonzeros[l->index()];
635 for(
size_t j=0UL; j<n; ++j ) {
636 (~lhs).reserve( j, nonzeros[j] );
640 for(
size_t i=0UL; i<m; ++i ) {
641 for(
auto element=A.begin(i); element!=A.end(i); ++element )
642 (~lhs).append( i, element->index(), element->value() * B(i,element->index()) );
660 template<
typename MT
662 friend inline auto addAssign( DenseMatrix<MT,SO2>& lhs,
const SMatDMatSchurExpr& rhs )
663 -> EnableIf_t< UseAssign_v<MT> >
680 for(
size_t i=0UL; i<(~lhs).
rows(); ++i ) {
681 for(
auto element=A.begin(i); element!=A.end(i); ++element )
682 (~lhs)(i,element->index()) += element->value() * B(i,element->index());
704 template<
typename MT
706 friend inline auto subAssign( DenseMatrix<MT,SO2>& lhs,
const SMatDMatSchurExpr& rhs )
707 -> EnableIf_t< UseAssign_v<MT> >
724 for(
size_t i=0UL; i<(~lhs).
rows(); ++i ) {
725 for(
auto element=A.begin(i); element!=A.end(i); ++element )
726 (~lhs)(i,element->index()) -= element->value() * B(i,element->index());
749 template<
typename MT
751 friend inline void schurAssign( DenseMatrix<MT,SO2>& lhs,
const SMatDMatSchurExpr& rhs )
768 for(
size_t i=0UL; i<(~lhs).
rows(); ++i )
770 const auto end( A.end(i) );
771 auto begin( A.begin(i) );
776 for( ; j<index; ++j )
777 reset( (~lhs)(i,j) );
778 (~lhs)(i,index) *=
begin->
value() * B(i,index);
782 for( ; j<(~lhs).
columns(); ++j )
783 reset( (~lhs)(i,j) );
838 template<
typename MT
899 template<
typename MT1
901 , DisableIf_t< ( IsUniLower_v<MT1> && IsUniUpper_v<MT2> ) ||
902 ( IsUniUpper_v<MT1> && IsUniLower_v<MT2> ) ||
903 ( IsStrictlyLower_v<MT1> && IsUpper_v<MT2> ) ||
904 ( IsStrictlyUpper_v<MT1> && IsLower_v<MT2> ) ||
905 ( IsLower_v<MT1> && IsStrictlyUpper_v<MT2> ) ||
906 ( IsUpper_v<MT1> && IsStrictlyLower_v<MT2> ) ||
907 IsZero_v<MT1> >* =
nullptr >
908 inline const SMatDMatSchurExpr<MT1,MT2>
909 smatdmatschur(
const SparseMatrix<MT1,false>& lhs,
const DenseMatrix<MT2,false>& rhs )
916 return SMatDMatSchurExpr<MT1,MT2>( ~lhs, ~rhs );
936 template<
typename MT1
938 , EnableIf_t< ( IsUniLower_v<MT1> && IsUniUpper_v<MT2> ) ||
939 ( IsUniUpper_v<MT1> && IsUniLower_v<MT2> ) >* =
nullptr >
940 inline decltype(
auto)
941 smatdmatschur( const SparseMatrix<MT1,false>& lhs, const DenseMatrix<MT2,false>& rhs )
950 using ReturnType =
const SchurTrait_t< ResultType_t<MT1>, ResultType_t<MT2> >;
975 template<
typename MT1
977 , EnableIf_t< ( IsStrictlyLower_v<MT1> && IsUpper_v<MT2> ) ||
978 ( IsStrictlyUpper_v<MT1> && IsLower_v<MT2> ) ||
979 ( IsLower_v<MT1> && IsStrictlyUpper_v<MT2> ) ||
980 ( IsUpper_v<MT1> && IsStrictlyLower_v<MT2> ) ||
981 IsZero_v<MT1> >* =
nullptr >
982 inline decltype(
auto)
983 smatdmatschur( const SparseMatrix<MT1,false>& lhs, const DenseMatrix<MT2,false>& rhs )
992 using ReturnType =
const SchurTrait_t< ResultType_t<MT1>, ResultType_t<MT2> >;
1032 template<
typename MT1
1034 inline decltype(
auto)
1043 return smatdmatschur( ~lhs, ~rhs );
1061 template<
typename MT1
1063 , DisableIf_t< ( IsUniLower_v<MT1> && IsUniUpper_v<MT2> ) ||
1064 ( IsUniUpper_v<MT1> && IsUniLower_v<MT2> ) ||
1065 ( IsStrictlyLower_v<MT1> && IsUpper_v<MT2> ) ||
1066 ( IsStrictlyUpper_v<MT1> && IsLower_v<MT2> ) ||
1067 ( IsLower_v<MT1> && IsStrictlyUpper_v<MT2> ) ||
1068 ( IsUpper_v<MT1> && IsStrictlyLower_v<MT2> ) ||
1069 IsZero_v<MT1> >* =
nullptr >
1070 inline const SMatDMatSchurExpr<MT1,MT2>
1071 smattdmatschur(
const SparseMatrix<MT1,false>& lhs,
const DenseMatrix<MT2,true>& rhs )
1078 return SMatDMatSchurExpr<MT1,MT2>( ~lhs, ~rhs );
1098 template<
typename MT1
1100 , EnableIf_t< ( IsUniLower_v<MT1> && IsUniUpper_v<MT2> ) ||
1101 ( IsUniUpper_v<MT1> && IsUniLower_v<MT2> ) >* =
nullptr >
1102 inline decltype(
auto)
1103 smattdmatschur( const SparseMatrix<MT1,false>& lhs, const DenseMatrix<MT2,true>& rhs )
1112 using ReturnType =
const SchurTrait_t< ResultType_t<MT1>, ResultType_t<MT2> >;
1137 template<
typename MT1
1139 , EnableIf_t< ( IsStrictlyLower_v<MT1> && IsUpper_v<MT2> ) ||
1140 ( IsStrictlyUpper_v<MT1> && IsLower_v<MT2> ) ||
1141 ( IsLower_v<MT1> && IsStrictlyUpper_v<MT2> ) ||
1142 ( IsUpper_v<MT1> && IsStrictlyLower_v<MT2> ) ||
1143 IsZero_v<MT1> >* =
nullptr >
1144 inline decltype(
auto)
1145 smattdmatschur( const SparseMatrix<MT1,false>& lhs, const DenseMatrix<MT2,true>& rhs )
1154 using ReturnType =
const SchurTrait_t< ResultType_t<MT1>, ResultType_t<MT2> >;
1195 template<
typename MT1
1197 inline decltype(
auto)
1206 return smattdmatschur( ~lhs, ~rhs );
1221 template<
typename MT1,
typename MT2 >
1222 struct Size< SMatDMatSchurExpr<MT1,MT2>, 0UL >
1223 :
public Maximum< Size<MT1,0UL>, Size<MT2,0UL> >
1226 template<
typename MT1,
typename MT2 >
1227 struct Size< SMatDMatSchurExpr<MT1,MT2>, 1UL >
1228 :
public Maximum< Size<MT1,1UL>, Size<MT2,1UL> >
LeftOperand leftOperand() const noexcept
Returns the left-hand side sparse matrix operand.
Definition: SMatDMatSchurExpr.h:461
Constraint on the data type.
ReturnType_t< MT2 > RN2
Return type of the right-hand side dense matrix expression.
Definition: SMatDMatSchurExpr.h:110
#define BLAZE_THROW_INVALID_ARGUMENT(MESSAGE)
Macro for the emission of a std::invalid_argument exception.This macro encapsulates the default way o...
Definition: Exception.h:235
Pointer difference type of the Blaze library.
RightOperand rightOperand() const noexcept
Returns the right-hand side dense matrix operand.
Definition: SMatDMatSchurExpr.h:471
Header file for auxiliary alias declarations.
size_t rows() const noexcept
Returns the current number of rows of the matrix.
Definition: SMatDMatSchurExpr.h:381
#define BLAZE_CONSTRAINT_MUST_BE_IDENTITY_MATRIX_TYPE(T)
Constraint on the data type.In case the given data type T is not an identity matrix type...
Definition: Identity.h:60
Header file for the Schur product trait.
Header file for the UNUSED_PARAMETER function template.
Header file for the IsUniUpper type trait.
ConstIterator find(size_t i, size_t j) const
Searches for a specific matrix element.
Definition: SMatDMatSchurExpr.h:424
Header file for basic type definitions.
typename If< Condition, T1, T2 >::Type If_t
Auxiliary alias declaration for the If class template.The If_t alias declaration provides a convenien...
Definition: If.h:109
const If_t< returnExpr, ExprReturnType, ElementType > ReturnType
Return type for expression template evaluations.
Definition: SMatDMatSchurExpr.h:155
bool operator!=(const ConstIterator &rhs) const
Inequality comparison between two ConstIterator objects.
Definition: SMatDMatSchurExpr.h:276
typename T::ResultType ResultType_t
Alias declaration for nested ResultType type definitions.The ResultType_t alias declaration provides ...
Definition: Aliases.h:390
Header file for the serial shim.
ReturnType at(size_t i, size_t j) const
Checked access to the matrix elements.
Definition: SMatDMatSchurExpr.h:343
size_t columns() const noexcept
Returns the current number of columns of the matrix.
Definition: SMatDMatSchurExpr.h:391
#define BLAZE_CONSTRAINT_MUST_BE_DENSE_MATRIX_TYPE(T)
Constraint on the data type.In case the given data type T is not a dense, N-dimensional matrix type...
Definition: DenseMatrix.h:61
DifferenceType operator-(const ConstIterator &rhs) const
Calculating the number of elements between two expression iterators.
Definition: SMatDMatSchurExpr.h:287
bool operator==(const ConstIterator &rhs) const
Equality comparison between two ConstIterator objects.
Definition: SMatDMatSchurExpr.h:265
Element ValueType
Type of the underlying pointers.
Definition: SMatDMatSchurExpr.h:181
decltype(std::declval< RN1 >() *std::declval< RN2 >()) ExprReturnType
Expression return type for the subscript operator.
Definition: SMatDMatSchurExpr.h:125
SMatDMatSchurExpr(const MT1 &lhs, const MT2 &rhs) noexcept
Constructor for the SMatDMatSchurExpr class.
Definition: SMatDMatSchurExpr.h:312
void reset(const DiagonalProxy< MT > &proxy)
Resetting the represented element to the default initial values.
Definition: DiagonalProxy.h:591
static constexpr bool useAssign
Compilation switch for the evaluation strategy of the Schur product expression.
Definition: SMatDMatSchurExpr.h:136
Constraint on the data type.
OppositeType_t< ResultType > OppositeType
Result type with opposite storage order for expression template evaluations.
Definition: SMatDMatSchurExpr.h:150
Header file for the Computation base class.
Constraints on the storage order of matrix types.
constexpr void UNUSED_PARAMETER(const Args &...)
Suppression of unused parameter warnings.
Definition: Unused.h:81
typename T::ReturnType ReturnType_t
Alias declaration for nested ReturnType type definitions.The ReturnType_t alias declaration provides ...
Definition: Aliases.h:410
Header file for the IsUniLower type trait.
size_t index() const
Access to the current index of the sparse element.
Definition: SMatDMatSchurExpr.h:254
#define BLAZE_CONSTRAINT_MUST_FORM_VALID_SCHUREXPR(T1, T2)
Constraint on the data type.In case the given data types T1 and T2 do not form a valid matrix/matrix ...
Definition: SchurExpr.h:103
constexpr size_t columns(const Matrix< MT, SO > &matrix) noexcept
Returns the current number of columns of the matrix.
Definition: Matrix.h:514
Base class for dense matrices.The DenseMatrix class is a base class for all dense matrix classes...
Definition: DenseMatrix.h:80
Base class for sparse matrices.The SparseMatrix class is a base class for all sparse matrix classes...
Definition: Forward.h:137
typename T::ElementType ElementType_t
Alias declaration for nested ElementType type definitions.The ElementType_t alias declaration provide...
Definition: Aliases.h:170
Header file for all forward declarations for sparse vectors and matrices.
RightOperand rhs_
Right-hand side dense matrix of the Schur product expression.
Definition: SMatDMatSchurExpr.h:503
static constexpr bool smpAssignable
Compilation switch for the expression template assignment strategy.
Definition: SMatDMatSchurExpr.h:303
Header file for the SparseMatrix base class.
LeftIterator left_
Iterator over the elements of the left-hand side sparse matrix expression.
Definition: SMatDMatSchurExpr.h:294
Constraint on the data type.
Constraint on the data type.
Header file for the Maximum class template.
typename EnableIf< Condition, T >::Type EnableIf_t
Auxiliary type for the EnableIf class template.The EnableIf_t alias declaration provides a convenient...
Definition: EnableIf.h:138
Header file for the ValueIndexPair class.
Header file for the DisableIf class template.
Header file for the IsTemporary type trait class.
size_t row_
The row index of the iterator.
Definition: SMatDMatSchurExpr.h:296
Header file for the IsStrictlyUpper type trait.
ReturnType value() const
Access to the current value of the sparse element.
Definition: SMatDMatSchurExpr.h:244
Namespace of the Blaze C++ math library.
Definition: Blaze.h:58
std::forward_iterator_tag IteratorCategory
The iterator category.
Definition: SMatDMatSchurExpr.h:180
Header file for the If class template.
TransposeType_t< ResultType > TransposeType
Transpose type for expression template evaluations.
Definition: SMatDMatSchurExpr.h:151
#define BLAZE_CONSTRAINT_MUST_BE_ZERO_TYPE(T)
Constraint on the data type.In case the given data type T is not a zero vector or matrix type...
Definition: Zero.h:61
#define BLAZE_THROW_OUT_OF_RANGE(MESSAGE)
Macro for the emission of a std::out_of_range exception.This macro encapsulates the default way of Bl...
Definition: Exception.h:331
ResultType_t< MT2 > RT2
Result type of the right-hand side dense matrix expression.
Definition: SMatDMatSchurExpr.h:108
const Element * ConstIterator
Iterator over constant elements.
Definition: CompressedMatrix.h:3086
Header file for the IsLower type trait.
ConstIterator upperBound(size_t i, size_t j) const
Returns an iterator to the first index greater then the given index.
Definition: SMatDMatSchurExpr.h:450
LeftOperand lhs_
Left-hand side sparse matrix of the Schur product expression.
Definition: SMatDMatSchurExpr.h:502
bool isAliased(const T *alias) const noexcept
Returns whether the expression is aliased with the given address alias.
Definition: SMatDMatSchurExpr.h:495
CompositeType_t< MT2 > CT2
Composite type of the right-hand side dense matrix expression.
Definition: SMatDMatSchurExpr.h:112
ValueIndexPair< ElementType > Element
Element type of the sparse matrix expression.
Definition: SMatDMatSchurExpr.h:175
Header file for the exception macros of the math module.
RightOperand right_
Right-hand side dense matrix expression.
Definition: SMatDMatSchurExpr.h:295
Constraint on the data type.
Header file for all forward declarations for expression class templates.
Header file for the EnableIf class template.
Header file for the IsStrictlyLower type trait.
ResultType_t< MT1 > RT1
Result type of the left-hand side sparse matrix expression.
Definition: SMatDMatSchurExpr.h:107
typename T::OppositeType OppositeType_t
Alias declaration for nested OppositeType type definitions.The OppositeType_t alias declaration provi...
Definition: Aliases.h:270
static constexpr bool returnExpr
Compilation switch for the selection of the subscript operator return type.
Definition: SMatDMatSchurExpr.h:122
const ConstIterator * operator->() const
Direct access to the sparse matrix element at the current iterator position.
Definition: SMatDMatSchurExpr.h:234
#define BLAZE_CONSTRAINT_MUST_BE_ROW_MAJOR_MATRIX_TYPE(T)
Constraint on the data type.In case the given data type T is not a row-major dense or sparse matrix t...
Definition: RowMajorMatrix.h:61
size_t nonZeros() const
Returns the number of non-zero elements in the sparse matrix.
Definition: SMatDMatSchurExpr.h:401
typename T::TransposeType TransposeType_t
Alias declaration for nested TransposeType type definitions.The TransposeType_t alias declaration pro...
Definition: Aliases.h:470
Header file for run time assertion macros.
typename T::CompositeType CompositeType_t
Alias declaration for nested CompositeType type definitions.The CompositeType_t alias declaration pro...
Definition: Aliases.h:90
ConstIterator(LeftIterator left, RightOperand right, size_t row)
Constructor for the ConstIterator class.
Definition: SMatDMatSchurExpr.h:201
Header file for the SchurExpr base class.
decltype(auto) row(Matrix< MT, SO > &, RRAs...)
Creating a view on a specific row of the given matrix.
Definition: Row.h:133
typename SchurTrait< T1, T2 >::Type SchurTrait_t
Auxiliary alias declaration for the SchurTrait class template.The SchurTrait_t alias declaration prov...
Definition: SchurTrait.h:164
ConstIterator end(size_t i) const
Returns an iterator just past the last non-zero element of row i.
Definition: SMatDMatSchurExpr.h:371
Header file for the IsZero type trait.
#define BLAZE_FUNCTION_TRACE
Function trace macro.This macro can be used to reliably trace function calls. In case function tracin...
Definition: FunctionTrace.h:94
If_t< useAssign, const ResultType, const SMatDMatSchurExpr &> CompositeType
Data type for composite expression templates.
Definition: SMatDMatSchurExpr.h:158
ConstIterator & operator++()
Pre-increment operator.
Definition: SMatDMatSchurExpr.h:213
ptrdiff_t DifferenceType
Difference between two iterators.
Definition: SMatDMatSchurExpr.h:184
decltype(auto) serial(const DenseMatrix< MT, SO > &dm)
Forces the serial evaluation of the given dense matrix expression dm.
Definition: DMatSerialExpr.h:808
ReturnType_t< MT1 > RN1
Return type of the left-hand side sparse matrix expression.
Definition: SMatDMatSchurExpr.h:109
ValueType & ReferenceType
Reference return type.
Definition: SMatDMatSchurExpr.h:183
const Element operator*() const
Direct access to the sparse matrix element at the current iterator position.
Definition: SMatDMatSchurExpr.h:224
#define BLAZE_CONSTRAINT_MUST_NOT_REQUIRE_EVALUATION(T)
Constraint on the data type.In case the given data type T requires an intermediate evaluation within ...
Definition: RequiresEvaluation.h:81
auto smpSchurAssign(Matrix< MT1, SO1 > &lhs, const Matrix< MT2, SO2 > &rhs) -> EnableIf_t< IsDenseMatrix_v< MT1 > >
Default implementation of the SMP Schur product assignment of a matrix to dense matrix.
Definition: DenseMatrix.h:194
constexpr size_t rows(const Matrix< MT, SO > &matrix) noexcept
Returns the current number of rows of the matrix.
Definition: Matrix.h:498
CompositeType_t< MT1 > CT1
Composite type of the left-hand side sparse matrix expression.
Definition: SMatDMatSchurExpr.h:111
Header file for the RemoveReference type trait.
typename T::ConstIterator ConstIterator_t
Alias declaration for nested ConstIterator type definitions.The ConstIterator_t alias declaration pro...
Definition: Aliases.h:110
const Type & ReturnType
Return type for expression template evaluations.
Definition: CompressedMatrix.h:3081
Iterator over the elements of the sparse matrix/dense matrix Schur product expression.
Definition: SMatDMatSchurExpr.h:170
Index-value-pair for sparse vectors and matrices.The ValueIndexPair class represents a single index-v...
Definition: ValueIndexPair.h:73
SchurTrait_t< RT1, RT2 > ResultType
Result type for expression template evaluations.
Definition: SMatDMatSchurExpr.h:149
Header file for the IntegralConstant class template.
size_t nonZeros(size_t i) const
Returns the number of non-zero elements in the specified row.
Definition: SMatDMatSchurExpr.h:412
bool canAlias(const T *alias) const noexcept
Returns whether the expression can alias with the given address alias.
Definition: SMatDMatSchurExpr.h:483
If_t< IsExpression_v< MT2 >, const MT2, const MT2 &> RightOperand
Composite type of the right-hand side dense matrix expression.
Definition: SMatDMatSchurExpr.h:164
If_t< IsExpression_v< MT1 >, const MT1, const MT1 &> LeftOperand
Composite type of the left-hand side sparse matrix expression.
Definition: SMatDMatSchurExpr.h:161
ValueType * PointerType
Pointer return type.
Definition: SMatDMatSchurExpr.h:182
Header file for the IsUpper type trait.
ConstIterator_t< RemoveReference_t< LeftOperand > > LeftIterator
Iterator type of the sparse matrix expression.
Definition: SMatDMatSchurExpr.h:178
ElementType_t< ResultType > ElementType
Resulting element type.
Definition: SMatDMatSchurExpr.h:152
Header file for the Size type trait.
#define BLAZE_CONSTRAINT_MUST_NOT_BE_ZERO_TYPE(T)
Constraint on the data type.In case the given data type T is a zero vector or matrix type...
Definition: Zero.h:81
IteratorCategory iterator_category
The iterator category.
Definition: SMatDMatSchurExpr.h:187
Expression object for sparse matrix-dense matrix Schur product.The SMatDMatSchurExpr class represents...
Definition: Forward.h:116
ConstIterator begin(size_t i) const
Returns an iterator to the first non-zero element of row i.
Definition: SMatDMatSchurExpr.h:360
#define BLAZE_INTERNAL_ASSERT(expr, msg)
Run time assertion macro for internal checks.In case of an invalid run time expression, the program execution is terminated. The BLAZE_INTERNAL_ASSERT macro can be disabled by setting the BLAZE_USER_ASSERTION flag to zero or by defining NDEBUG during the compilation.
Definition: Assert.h:101
ReturnType operator()(size_t i, size_t j) const
2D-access to the matrix elements.
Definition: SMatDMatSchurExpr.h:328
#define BLAZE_CONSTRAINT_MUST_BE_SPARSE_MATRIX_TYPE(T)
Constraint on the data type.In case the given data type T is not a sparse, N-dimensional matrix type...
Definition: SparseMatrix.h:61
If_t< Less< T1, T2 >::value, T2, T1 > Maximum
Compile time value evaluation.The Maximum alias declaration selects the larger of the two given templ...
Definition: Maximum.h:73
Header file for the IsExpression type trait class.
Header file for the function trace functionality.
Constraint on the data type.
ConstIterator lowerBound(size_t i, size_t j) const
Returns an iterator to the first index not less then the given index.
Definition: SMatDMatSchurExpr.h:437