94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
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// Copyright (C) 2011-2012 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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//! \addtogroup fn_syl_lyap
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//! @{
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//! find the solution of the Sylvester equation AX + XB = C
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template<typename T1, typename T2, typename T3>
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inline
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bool
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syl
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(
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Mat <typename T1::elem_type> & out,
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const Base<typename T1::elem_type,T1>& in_A,
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const Base<typename T1::elem_type,T2>& in_B,
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const Base<typename T1::elem_type,T3>& in_C,
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const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0
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)
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{
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arma_extra_debug_sigprint();
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arma_ignore(junk);
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typedef typename T1::elem_type eT;
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const unwrap_check<T1> tmp_A(in_A.get_ref(), out);
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const unwrap_check<T2> tmp_B(in_B.get_ref(), out);
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const unwrap_check<T3> tmp_C(in_C.get_ref(), out);
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const Mat<eT>& A = tmp_A.M;
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const Mat<eT>& B = tmp_B.M;
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const Mat<eT>& C = tmp_C.M;
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const bool status = auxlib::syl(out, A, B, C);
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if(status == false)
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{
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out.reset();
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arma_debug_warn("syl(): solution not found");
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}
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return status;
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}
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template<typename T1, typename T2, typename T3>
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inline
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Mat<typename T1::elem_type>
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syl
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(
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const Base<typename T1::elem_type,T1>& in_A,
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const Base<typename T1::elem_type,T2>& in_B,
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const Base<typename T1::elem_type,T3>& in_C,
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const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0
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)
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{
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arma_extra_debug_sigprint();
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arma_ignore(junk);
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typedef typename T1::elem_type eT;
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const unwrap<T1> tmp_A( in_A.get_ref() );
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const unwrap<T2> tmp_B( in_B.get_ref() );
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const unwrap<T3> tmp_C( in_C.get_ref() );
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const Mat<eT>& A = tmp_A.M;
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const Mat<eT>& B = tmp_B.M;
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const Mat<eT>& C = tmp_C.M;
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Mat<eT> out;
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const bool status = auxlib::syl(out, A, B, C);
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if(status == false)
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{
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out.reset();
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arma_bad("syl(): solution not found");
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}
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return out;
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}
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//! @}
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