HLIBpro
2.9.1

Approximate all lowrank blocks by zero, e.g. for nearfield only. More...
#include <TLowRankApx.hh>
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  
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 0rank low rank matrix.

inline 
build low rank matrix for block cluster bct with rank defined by accuracy acc
virtual TMatrix* build 
build low rank matrix for block index set bis with rank defined by accuracy acc