wigner.h

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/*
 * Copyright (c) 2002, 2017 Jens Keiner, Stefan Kunis, Daniel Potts
 *
 * 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; 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef WIGNER_H
#define WIGNER_H

double SO3_alpha(int k, int m, int l);
double SO3_beta(int k, int m, int l);
double SO3_gamma(int k, int m, int l);
void SO3_alpha_row(double *alpha, int N, int m, int n);
void SO3_beta_row(double *beta, int N, int m, int n);
void SO3_gamma_row(double *gamma, int N, int m, int n);
void SO3_alpha_matrix(double *alpha, int N, int n);
void SO3_beta_matrix(double *beta, int N, int n);
void SO3_gamma_matrix(double *gamma, int N, int n);

void SO3_alpha_all(double *alpha, int N);
void SO3_beta_all(double *beta, int N);
void SO3_gamma_all(double *gamma, int N);

void eval_wigner(double *x, double *y, int size, int l, double *alpha,
    double *beta, double *gamma);
int eval_wigner_thresh(double *x, double *y, int size, int l, double *alpha,
    double *beta, double *gamma, double threshold);

double wigner_start(int n1, int n2, double theta);

#endif