HLuDecomposer

class HLuDecomposer : public TObject

    public:

                      HLuDecomposer()
                      HLuDecomposer(const HLuDecomposer&)
                      ~HLuDecomposer()
                 void backSubstitute(HRtVector& b)
                 void backSubstitute(HRtMatrix& b)
       static TClass* Class()
                 void decompose(HRtMatrix& a)
      virtual TClass* IsA() const
       HLuDecomposer& operator=(const HLuDecomposer&)
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)

Data Members

    protected:

         TArrayI fPermutations       [fDimension]
           Int_t fPermutationParity  
      HRtMatrix* fA                  !Processed matrix

Class Description

 HLuDecomposer

  Implements LU decomposition of a HRtMatrix and backsubsitution
to invert the matrix or solve linear problems

  Both functions alter the data passed as arguments

 Decomposes matrix a into a L and U matrixes. Decomposition is done
in place, i.e. "a" is overwritten.

 Stores the solution of the linear ecuation Ax = b into the vector
b. The system matrix A had to previously be specified using
decompose()

 Stores in b the result of inverse(lu)*b. This is faster than
doing the actual inverse matrix calculation and then multiplying.

Inline Functions

               TClass* Class()
               TClass* IsA() const
                  void ShowMembers(TMemberInspector& insp, char* parent)
                  void Streamer(TBuffer& b)
                  void StreamerNVirtual(TBuffer& b)
         HLuDecomposer HLuDecomposer(const HLuDecomposer&)
        HLuDecomposer& operator=(const HLuDecomposer&)