TZeroLRApx Class Reference

Approximate all low-rank blocks by zero, e.g. for nearfield only. More...

#include <TLowRankApx.hh>

Inheritance diagram for TZeroLRApx:

Public Member Functions
virtual TMatrix *	build (const TBlockIndexSet &bis, const TTruncAcc &acc) const
	return low rank matrix of rank 0
virtual TMatrix *	build (const TBlockCluster *bct, const TTruncAcc &acc) const
virtual TMatrix *	build (const TBlockIndexSet &bis, const TTruncAcc &acc) const=0
Public Member Functions inherited from TLowRankApx
virtual TMatrix *	build (const TBlockCluster *bct, const TTruncAcc &acc) const
virtual bool	has_statistics () const
	indicate if algorithm provides statistics

Detailed Description

     If only the near field blocks of a matrix should be computed,
     TZeroLRApx will do that by approximating all far field blocks
     by zero, e.g. a 0-rank low rank matrix.

Member Function Documentation

build() [1/2]

virtual TMatrix* build

inline

build low rank matrix for block cluster bct with rank defined by accuracy acc

build() [2/2]

virtual TMatrix* build

build low rank matrix for block index set bis with rank defined by accuracy acc