/usr/include/sdet.h is in libalglib-dev 2.6.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (c) 2005-2007, Sergey Bochkanov (ALGLIB project).
>>> SOURCE LICENSE >>>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation (www.fsf.org); either version 2 of the
License, or (at your option) any later version.
This program 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 General Public License for more details.
A copy of the GNU General Public License is available at
http://www.fsf.org/licensing/licenses
>>> END OF LICENSE >>>
*************************************************************************/
#ifndef _sdet_h
#define _sdet_h
#include "ap.h"
#include "ialglib.h"
#include "ldlt.h"
/*************************************************************************
Determinant calculation of the matrix given by LDLT decomposition.
Input parameters:
A - LDLT-decomposition of the matrix,
output of subroutine SMatrixLDLT.
Pivots - table of permutations which were made during
LDLT decomposition, output of subroutine SMatrixLDLT.
N - size of matrix A.
IsUpper - matrix storage format. The value is equal to the input
parameter of subroutine SMatrixLDLT.
Result:
matrix determinant.
-- ALGLIB --
Copyright 2005-2008 by Bochkanov Sergey
*************************************************************************/
double smatrixldltdet(const ap::real_2d_array& a,
const ap::integer_1d_array& pivots,
int n,
bool isupper);
/*************************************************************************
Determinant calculation of the symmetric matrix
Input parameters:
A - matrix. Array with elements [0..N-1, 0..N-1].
N - size of matrix A.
IsUpper - if IsUpper = True, then symmetric matrix A is given by its
upper triangle, and the lower triangle isn�t used by
subroutine. Similarly, if IsUpper = False, then A is given
by its lower triangle.
Result:
determinant of matrix A.
-- ALGLIB --
Copyright 2005-2008 by Bochkanov Sergey
*************************************************************************/
double smatrixdet(ap::real_2d_array a, int n, bool isupper);
double determinantldlt(const ap::real_2d_array& a,
const ap::integer_1d_array& pivots,
int n,
bool isupper);
double determinantsymmetric(ap::real_2d_array a, int n, bool isupper);
#endif
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