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MoochoPack_QuasiRangeSpaceStepStd_Strategy.cpp
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00041 
00042 #include "MoochoPack_QuasiRangeSpaceStepStd_Strategy.hpp"
00043 #include "MoochoPack_NLPAlgoState.hpp"
00044 #include "AbstractLinAlgPack_MatrixOpNonsing.hpp"
00045 #include "AbstractLinAlgPack_VectorSpace.hpp"
00046 #include "AbstractLinAlgPack_LinAlgOpPack.hpp"
00047 
00048 namespace MoochoPack {
00049 
00050 bool QuasiRangeSpaceStepStd_Strategy::solve_quasi_range_space_step(
00051   std::ostream& out, EJournalOutputLevel olevel, NLPAlgo *algo, NLPAlgoState *s
00052   ,const Vector& xo, const Vector& c_xo, VectorMutable* v
00053     )
00054 {
00055   using LinAlgOpPack::V_InvMtV;
00056   using LinAlgOpPack::V_StMtV;
00057   const MatrixOpNonsing
00058     &R_k = s->R().get_k(0);
00059   VectorSpace::vec_mut_ptr_t
00060     vy = R_k.space_rows().create_member();
00061   // vy = inv(R_k) * c_xo
00062   V_InvMtV( vy.get(), R_k, BLAS_Cpp::no_trans, c_xo );
00063   // v = -Y_k*vy
00064   V_StMtV( v, -1.0, s->Y().get_k(0), BLAS_Cpp::no_trans, *vy );
00065 
00066   return true;
00067 }
00068 
00069 void QuasiRangeSpaceStepStd_Strategy::print_step( std::ostream& out, const std::string& L ) const
00070 {
00071   out << L << "*** Compute the approximate range space step:\n"
00072     << L << "vy = inv(R_k) * c_xo\n"
00073     << L << "v = -Y_k*vy\n";
00074 }
00075 
00076 } // end namespace MoochoPack
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