/usr/include/linbox/blackbox/scompose.h is in liblinbox-dev 1.3.2-1.1+b1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 | /* Copyright (C) 2010 LinBox
* Written by Zhendong Wan
*
*
*
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*/
#ifndef __LINBOX_scompose_H
#define __LINBOX_scompose_H
/*! @file scompose.h
* Implemenatation of EGV and EGV+ algorithm.
* Compute the perturbation A+UV and LAR
*/
#include "linbox/util/debug.h"
#include "linbox/blackbox/blackbox-interface.h"
#include "linbox/blackbox/compose.h"
namespace LinBox
{
class SCompose : public BlackboxInterface {
public:
//- general case, composeSmall is the linbox compose
template<class Blackbox>
//For EGV+ algorithm, using LAR.
static Compose<Blackbox, Blackbox>*& compose (Compose<Blackbox, Blackbox>*& LAR,
const Blackbox& L,
const Blackbox& A,
const Blackbox& R)
{
linbox_check (L.coldim() == A.rowdim());
linbox_check (A.coldim() == R.rowdim());
std::vector<const Blackbox*> VB(3);
VB[0] = &L;
VB[1] = &A;
VB[2] = &R;
LAR = new Compose<Blackbox>(VB);
return LAR;
}
template <class Field>
static BlasMatrix<Field>*& compose (BlasMatrix<Field>*& LAR,
const BlasMatrix<Field>& L,
const BlasMatrix<Field>& A,
const BlasMatrix<Field>& R)
{
linbox_check (L.coldim() == A.rowdim());
linbox_check (A.coldim() == R.rowdim());
LAR = new BlasMatrix<Field>(L.field(), L.rowdim(), R.coldim());
typename BlasMatrix<Field>::ConstRowIterator crow_p;
typename BlasMatrix<Field>::RowIterator row_p;
std::vector<typename Field::Element> tmp(R.rowdim());
for (row_p = LAR -> rowBegin(), crow_p = L.rowBegin();
row_p != LAR -> rowEnd(); ++ row_p, ++ crow_p) {
A.applyTranspose(tmp, *crow_p);
R.applyTranspose(*row_p, tmp);
}
return LAR;
}
};
}
#endif //__LINBOX_scompose_H
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