LORENE
tenseur_inv_pois_vect.C
1 /*
2  * Copyright (c) 2000-2001 Philippe Grandclement
3  *
4  * This file is part of LORENE.
5  *
6  * LORENE is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * LORENE is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with LORENE; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  */
21 
22 
23 char tenseur_inv_pois_vect_C[] = "$Header: /cvsroot/Lorene/C++/Source/Tenseur/tenseur_inv_pois_vect.C,v 1.5 2014/10/13 08:53:42 j_novak Exp $" ;
24 
25 /*
26  * $Id: tenseur_inv_pois_vect.C,v 1.5 2014/10/13 08:53:42 j_novak Exp $
27  * $Log: tenseur_inv_pois_vect.C,v $
28  * Revision 1.5 2014/10/13 08:53:42 j_novak
29  * Lorene classes and functions now belong to the namespace Lorene.
30  *
31  * Revision 1.4 2014/10/06 15:13:18 j_novak
32  * Modified #include directives to use c++ syntax.
33  *
34  * Revision 1.3 2005/08/29 09:41:45 p_grandclement
35  * Minor modif
36  *
37  * Revision 1.2 2002/08/07 16:14:11 j_novak
38  * class Tenseur can now also handle tensor densities, this should be transparent to older codes
39  *
40  * Revision 1.1.1.1 2001/11/20 15:19:30 e_gourgoulhon
41  * LORENE
42  *
43  * Revision 2.0 2000/10/19 09:49:47 phil
44  * *** empty log message ***
45  *
46  *
47  * $Header: /cvsroot/Lorene/C++/Source/Tenseur/tenseur_inv_pois_vect.C,v 1.5 2014/10/13 08:53:42 j_novak Exp $
48  *
49  */
50 
51 //Standard
52 #include <cstdlib>
53 
54 //Lorene
55 #include "tenseur.h"
56 
57 // Inversion de Poisson vectoriel :
58 namespace Lorene {
59 Tenseur Tenseur::inverse_poisson_vect (double lambda) const {
60 
61  assert (valence == 1) ;
62  assert (etat != ETATNONDEF) ;
63  if (etat == ETATZERO)
64  return (*this) ;
65 
66  Tenseur inverse (*mp, 1, CON, *get_triad(), metric, poids) ;
67  Tenseur grad (contract(this->gradient(), 0, 1)) ;
68  grad.dec2_dzpuis() ;
69  Tenseur grad_shift (grad.gradient()) ;
70  grad_shift.inc2_dzpuis() ;
71  inverse.set_etat_qcq() ;
72  for (int i=0 ; i<3 ; i++)
73  inverse.set(i) = (*this)(i).laplacien(4)+lambda*grad_shift(i) ;
74 
75  return inverse ;
76 }
77 }
const Map *const mp
Reference mapping.
Definition: tenseur.h:303
void dec2_dzpuis()
dzpuis -= 2 ;
Definition: tenseur.C:1130
Lorene prototypes.
Definition: app_hor.h:64
int etat
Logical state ETATZERO , ETATQCQ or ETATNONDEF.
Definition: tenseur.h:318
void inc2_dzpuis()
dzpuis += 2 ;
Definition: tenseur.C:1143
Cmp & set()
Read/write for a scalar (see also operator=(const Cmp&) ).
Definition: tenseur.C:824
int valence
Valence.
Definition: tenseur.h:304
const Base_vect * get_triad() const
Returns the vectorial basis (triad) on which the components are defined.
Definition: tenseur.h:701
double poids
For tensor densities: the weight.
Definition: tenseur.h:320
friend Tenseur contract(const Tenseur &, int id1, int id2)
Self contraction of two indices of a Tenseur .
Tenseur inverse_poisson_vect(double lambda) const
Compute of *this , *this being of valence 1.
const Metrique * metric
For tensor densities: the metric defining the conformal factor.
Definition: tenseur.h:322
void set_etat_qcq()
Sets the logical state to ETATQCQ (ordinary state).
Definition: tenseur.C:636
Tensor handling *** DEPRECATED : use class Tensor instead ***.
Definition: tenseur.h:298
const Tenseur & gradient() const
Returns the gradient of *this (Cartesian coordinates)
Definition: tenseur.C:1542