cosmotool/external/sharp/libsharp/sharp_legendre_roots.h

51 lines
1.5 KiB
C

/*
* This file is part of libsharp.
*
* libsharp 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; either version 2 of the License, or
* (at your option) any later version.
*
* libsharp 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.
*
* You should have received a copy of the GNU General Public License
* along with libsharp; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* libsharp is being developed at the Max-Planck-Institut fuer Astrophysik
* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
* (DLR).
*/
/*! \file sharp_legendre_roots.h
*
* Copyright (C) 2006-2012 Max-Planck-Society
* \author Martin Reinecke
*/
#ifndef SHARP_LEGENDRE_ROOTS_H
#define SHARP_LEGENDRE_ROOTS_H
#ifdef __cplusplus
extern "C" {
#endif
/*! Computes roots and Gaussian quadrature weights for Legendre polynomial
of degree \a n.
\param n Order of Legendre polynomial
\param x Array of length \a n for output (root position)
\param w Array of length \a w for output (weight for Gaussian quadrature)
*/
void sharp_legendre_roots(int n, double *x, double *w);
#ifdef __cplusplus
}
#endif
#endif