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C
C Copyright (c) 1997 Silvano Bonazzola
C
C This file is part of LORENE.
C
C LORENE is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Public License as published by
C the Free Software Foundation; either version 2 of the License, or
C (at your option) any later version.
C
C LORENE is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU General Public License for more details.
C
C You should have received a copy of the GNU General Public License
C along with LORENE; if not, write to the Free Software
C Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
C
C
SUBROUTINE INTRAS(N,CC,OUT)
implicit double precision (a-h,o-z)
C
C ***** CALCUL DE L'INTEGRALE ENTRE 0 ET 1 D'UNE FONCTION ECHENTILLONEE
C ***** RAREMENT. (FONCTION PAIRE PAR RAPPORT TETA=PI/2)
C
C ARGUMENTS DE LA ROUTINE:
C
C N= NOMBRE DES DEGRES DE LIBERTEE-1
C CC = COEFFICIENTS DE TCHEBYTCHEV DE LA FONCTION A INTEGRER.
C OUT =VALEURE DE L'INTEGRALE
C
C Routine testee avec tous les tests de Routine
C (test de repetition compris le 4/4/1986)
C
C
C $Id: intras.f,v 1.2 2012/03/30 12:12:43 j_novak Exp $
C $Log: intras.f,v $
C Revision 1.2 2012/03/30 12:12:43 j_novak
C Cleaning of fortran files
C
C Revision 1.1.1.1 2001/11/20 15:19:30 e_gourgoulhon
C LORENE
C
c Revision 1.2 1997/05/23 11:40:14 hyc
c *** empty log message ***
c
C Revision 1.1 1997/03/17 20:40:48 hyc
C Initial revision
C
C
C $Header: /cvsroot/Lorene/F77/Source/Poisson2d/intras.f,v 1.2 2012/03/30 12:12:43 j_novak Exp $
C
C
character*120 header
data header/'$Header: /cvsroot/Lorene/F77/Source/Poisson2d/intras.f,v 1.2 2012/03/30 12:12:43 j_novak Exp $'/
DIMENSION CC(*)
N1=N+1
C1=CC(N1)
CC(N1)=C1*.5
SOM=0
COS2=-1
X1=1
DO 5 L=2,N1
COSL=-X1/(L+L-1)
SOM=SOM+CC(L)*(COS2-COSL)
COS2=COSL
5 CONTINUE
OUT=.5*(SOM+CC(1))
CC(N1)=C1
100 FORMAT(1X,10D24.16)
RETURN
END
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