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* Definition of Lorene class Sym_tensor,
* as well as derived classes Sym_tensor_trans and Sym_tensor_tt
*
*/
/*
* Copyright (c) 2003-2004 Eric Gourgoulhon & Jerome Novak
*
* This file is part of LORENE.
*
* LORENE is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* LORENE 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 LORENE; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __SYM_TENSOR_H_
#define __SYM_TENSOR_H_
/*
* $Id: sym_tensor.h,v 1.49 2014/10/13 08:52:36 j_novak Exp $
* $Log: sym_tensor.h,v $
* Revision 1.49 2014/10/13 08:52:36 j_novak
* Lorene classes and functions now belong to the namespace Lorene.
*
* Revision 1.48 2010/10/11 10:23:03 j_novak
* Removed methods Sym_tensor_trans::solve_hrr() and Sym_tensor_trans::set_WX_det_one(), as they are no longer relevant.
*
* Revision 1.47 2008/12/05 08:46:19 j_novak
* New method Sym_tensor_trans_aux::set_tt_part_det_one.
*
* Revision 1.46 2008/12/03 10:18:56 j_novak
* Method 6 is now the default for calls to vector Poisson solver.
*
* Revision 1.45 2008/08/20 14:39:53 n_vasset
* New Dirac solvers handling degenerate elliptic operators on excised spacetimes.
*
* Revision 1.44 2007/12/21 16:06:16 j_novak
* Methods to filter Tensor, Vector and Sym_tensor objects.
*
* Revision 1.43 2007/11/27 15:48:52 n_vasset
* New member p_tilde_c for class Sym_tensor
*
* Revision 1.42 2007/05/04 16:43:50 n_vasset
* adding of functions sol_Dirac_BC2 and sol_Dirac_A2
*
* Revision 1.41 2006/10/24 13:03:17 j_novak
* New methods for the solution of the tensor wave equation. Perhaps, first
* operational version...
*
* Revision 1.40 2006/08/31 12:13:21 j_novak
* Added an argument of type Param to Sym_tensor_trans::sol_ rac_A().
*
* Revision 1.39 2006/06/20 12:07:13 j_novak
* Improved execution speed for sol_Dirac_tildeB...
*
* Revision 1.38 2006/06/14 10:04:19 j_novak
* New methods sol_Dirac_l01, set_AtB_det_one and set_AtB_trace_zero.
*
* Revision 1.37 2006/06/13 13:30:12 j_novak
* New members sol_Dirac_A and sol_Dirac_tildeB (see documentation).
*
* Revision 1.36 2006/06/12 13:37:23 j_novak
* Added bounds in l (multipolar momentum) for Sym_tensor_trans::solve_hrr.
*
* Revision 1.35 2006/06/12 07:42:28 j_novak
* Fields A and tilde{B} are defined only for l>1.
*
* Revision 1.34 2006/06/12 07:27:18 j_novak
* New members concerning A and tilde{B}, dealing with the transverse part of the
* Sym_tensor.
*
* Revision 1.33 2005/11/28 14:45:14 j_novak
* Improved solution of the Poisson tensor equation in the case of a transverse
* tensor.
*
* Revision 1.32 2005/09/16 13:58:10 j_novak
* New Poisson solver for a Sym_tensor_trans.
*
* Revision 1.31 2005/09/07 16:47:42 j_novak
* Removed method Sym_tensor_trans::T_from_det_one
* Modified Sym_tensor::set_auxiliary, so that it takes eta/r and mu/r as
* arguments.
* Modified Sym_tensor_trans::set_hrr_mu.
* Added new protected method Sym_tensor_trans::solve_hrr
*
* Revision 1.30 2005/04/08 08:22:04 j_novak
* New methods set_hrr_mu_det_one() and set_WX_det_one(). Not tested yet...
*
* Revision 1.29 2005/04/06 15:43:58 j_novak
* New method Sym_tensor_trans::T_from_det_one(...).
*
* Revision 1.28 2005/04/04 15:25:22 j_novak
* Added new members www, xxx, ttt and the associated methods.
*
* Revision 1.27 2005/04/01 14:28:31 j_novak
* Members p_eta and p_mu are now defined in class Sym_tensor.
*
* Revision 1.26 2005/01/03 08:34:58 f_limousin
* Come back to the previous version.
*
* Revision 1.25 2005/01/03 08:15:39 f_limousin
* The first argument of the function trace_from_det_one(...) is now
* a Sym_tensor_trans instead of a Sym_tensor_tt (because of a
* compilation error with some compilators).
*
* Revision 1.24 2004/12/28 14:21:46 j_novak
* Added the method Sym_tensor_trans::trace_from_det_one
*
* Revision 1.23 2004/12/28 10:37:22 j_novak
* Better way of enforcing zero divergence.
*
* Revision 1.22 2004/06/14 20:44:44 e_gourgoulhon
* Added argument method_poisson to Sym_tensor::longit_pot and
* Sym_tensor::transverse.
*
* Revision 1.21 2004/05/25 14:57:20 f_limousin
* Add parameters in argument of functions transverse, longit_pot,
* set_tt_trace, tt_part and set_khi_mu for the case of a Map_et.
*
* Revision 1.20 2004/05/24 13:44:54 e_gourgoulhon
* Added parameter dzp to method Sym_tensor_tt::update.
*
* Revision 1.19 2004/04/08 16:37:54 e_gourgoulhon
* Sym_tensor_tt::set_khi_mu: added argument dzp (dzpuis of resulting h^{ij}).
*
* Revision 1.18 2004/03/30 14:01:19 j_novak
* Copy constructors and operator= now copy the "derived" members.
*
* Revision 1.17 2004/03/29 16:13:06 j_novak
* New methods set_longit_trans and set_tt_trace .
*
* Revision 1.16 2004/03/22 13:12:43 j_novak
* Modification of comments to use doxygen instead of doc++
*
* Revision 1.15 2004/03/03 13:54:16 j_novak
* Error in comments corrected.
*
* Revision 1.14 2004/03/03 13:16:20 j_novak
* New potential khi (p_khi) and the functions manipulating it.
*
* Revision 1.13 2004/02/26 22:45:13 e_gourgoulhon
* Added method derive_lie.
*
* Revision 1.12 2004/02/18 18:43:22 e_gourgoulhon
* Method trace() renamed the_trace() in order to avoid
* any confusion with new method Tensor::trace().
*
* Revision 1.11 2004/01/04 20:49:06 e_gourgoulhon
* Sym_tensor is now a derived class of Tensor_sym.
* Suppressed methods Sym_tensor::indices and Sym_tensor::position:
* they are now implemented at the Tensor_sym level.
*
* Revision 1.10 2003/11/27 16:05:11 e_gourgoulhon
* Changed return value of methods transverse( ) and longit_pot( ).
*
* Revision 1.9 2003/11/26 21:56:21 e_gourgoulhon
* Class Sym_tensor: added the members p_transverse and p_longit_pot,
* and the associated methods transverse( ), longit_pot( ),
* del_deriv_met( ) and set_der_met_0x0( ).
*
* Revision 1.8 2003/11/07 16:54:23 e_gourgoulhon
* Added method Sym_tensor_tt::poisson().
*
* Revision 1.7 2003/11/06 14:43:37 e_gourgoulhon
* Gave a name to const arguments in certain method prototypes (e.g.
* constructors) to correct a bug of DOC++.
*
* Revision 1.6 2003/11/05 15:26:31 e_gourgoulhon
* Modif documentation.
*
* Revision 1.5 2003/11/04 22:57:26 e_gourgoulhon
* Class Sym_tensor_tt: method set_eta_mu renamed set_rr_eta_mu
* method update_tp() renamed update()
* added method set_rr_mu.
*
* Revision 1.4 2003/11/03 22:29:54 e_gourgoulhon
* Class Sym_tensor_tt: added functions set_eta_mu and update_tp.
*
* Revision 1.3 2003/11/03 17:09:30 e_gourgoulhon
* Class Sym_tensor_tt: added the methods eta() and mu().
*
* Revision 1.2 2003/10/28 21:22:51 e_gourgoulhon
* Class Sym_tensor_trans: added methods trace() and tt_part().
*
* Revision 1.1 2003/10/27 10:45:19 e_gourgoulhon
* New derived classes Sym_tensor_trans and Sym_tensor_tt.
*
*
* $Header: /cvsroot/Lorene/C++/Include/sym_tensor.h,v 1.49 2014/10/13 08:52:36 j_novak Exp $
*
*/
namespace Lorene {
class Sym_tensor_trans ;
class Sym_tensor_tt ;
//---------------------------------//
// class Sym_tensor //
//---------------------------------//
/**
* Class intended to describe valence-2 symmetric tensors.
* The storage and the calculations are different and quicker than with an
* usual \c Tensor .
*
* The valence must be 2. \ingroup (tensor)
*
*/
class Sym_tensor : public Tensor_sym {
// Derived data :
// ------------
protected:
/** Array of the transverse part \f${}^t T^{ij}\f$ of the tensor with respect
* to various metrics, transverse meaning divergence-free with respect
* to a metric. Denoting \c *this by \f$T^{ij}\f$, we then have
* \f[
* T^{ij} = {}^t T^{ij} + \nabla^i W^j + \nabla^j W^i
* \qquad\mbox{with}\quad \nabla_j {}^t T^{ij} = 0
*\f]
* where \f$\nabla_i\f$ denotes the covariant derivative with respect
* to the given metric and \f$W^i\f$ is the vector potential of the
* longitudinal part of \f$T^{ij}\f$ (member \c p_longit_pot below)
*/
mutable Sym_tensor_trans* p_transverse[N_MET_MAX] ;
/** Array of the vector potential of the
* longitudinal part of the tensor with respect
* to various metrics (see documentation of member
* \c p_transverse
*/
mutable Vector* p_longit_pot[N_MET_MAX] ;
/** Field \f$\eta\f$ such that the components \f$(T^{r\theta}, T^{r\varphi})\f$
* of the tensor are written (has only meaning with spherical components!):
* \f[
* T^{r\theta} = {1\over r} \left( {\partial \eta \over \partial\theta} -
* {1\over\sin\theta} {\partial \mu \over \partial\varphi} \right)
*\f]
* \f[
* T^{r\varphi} = {1\over r} \left( {1\over\sin\theta}
* {\partial \eta \over \partial\varphi}
* + {\partial \mu \over \partial\theta} \right)
*\f]
*/
mutable Scalar* p_eta ;
/** Field \f$\mu\f$ such that the components \f$(T^{r\theta}, T^{r\varphi})\f$
* of the tensor are written (has only meaning with spherical components!):
* \f[
* T^{r\theta} = {1\over r} \left( {\partial \eta \over \partial\theta} -
* {1\over\sin\theta} {\partial \mu \over \partial\varphi} \right)
*\f]
* \f[
* T^{r\varphi} = {1\over r} \left( {1\over\sin\theta}
* {\partial \eta \over \partial\varphi}
* + {\partial \mu \over \partial\theta} \right)
*\f]
*/
mutable Scalar* p_mu ;
/** Field \e W such that the components \f$T^{\theta\theta},
* T^{\varphi\varphi}\f$ and \f$T^{\theta\varphi}\f$
* of the tensor are written (has only meaning with spherical components!):
* \f[
* \frac{1}{2}\left(T^{\theta\theta} - T^{\varphi\varphi} \right)
* = \frac{\partial^2 W}{\partial\theta^2} - \frac{1}{\tan
* \theta} \frac{\partial W}{\partial \theta} - \frac{1}{\sin^2 \theta}
* \frac{\partial^2 W}{\partial \varphi^2} - 2\frac{\partial}{\partial \theta}
* \left( \frac{1}{\sin \theta} \frac{\partial X}{\partial \varphi} \right) ,
*\f]
* \f[
* T^{\theta\varphi} = \frac{\partial^2 X}{\partial\theta^2} - \frac{1}{\tan
* \theta} \frac{\partial X}{\partial \theta} - \frac{1}{\sin^2 \theta}
* \frac{\partial^2 X}{\partial \varphi^2} + 2\frac{\partial}{\partial \theta}
* \left( \frac{1}{\sin \theta} \frac{\partial W}{\partial \varphi} \right) .
*\f]
*/
mutable Scalar* p_www ;
/** Field \e X such that the components \f$T^{\theta\theta},
* T^{\varphi\varphi}\f$ and \f$T^{\theta\varphi}\f$
* of the tensor are written (has only meaning with spherical components!):
* \f[
* \frac{1}{2}\left(T^{\theta\theta} - T^{\varphi\varphi} \right)
* = \frac{\partial^2 W}{\partial\theta^2} - \frac{1}{\tan
* \theta} \frac{\partial W}{\partial \theta} - \frac{1}{\sin^2 \theta}
* \frac{\partial^2 W}{\partial \varphi^2} - 2\frac{\partial}{\partial \theta}
* \left( \frac{1}{\sin \theta} \frac{\partial X}{\partial \varphi} \right) ,
*\f]
* \f[
* T^{\theta\varphi} = \frac{\partial^2 X}{\partial\theta^2} - \frac{1}{\tan
* \theta} \frac{\partial X}{\partial \theta} - \frac{1}{\sin^2 \theta}
* \frac{\partial^2 X}{\partial \varphi^2} + 2\frac{\partial}{\partial \theta}
* \left( \frac{1}{\sin \theta} \frac{\partial W}{\partial \varphi} \right) .
*\f]
*/
mutable Scalar* p_xxx ;
/// Field \e T defined as \f$ T = T^{\theta\theta} + T^{\varphi\varphi} \f$.
mutable Scalar* p_ttt ;
/** Field \e A defined from \e X and \f$\mu\f$ insensitive to the
* longitudinal part of the \c Sym_tensor (only for \f$\ell \geq 2\f$).
* Its definition reads \f[
* A = \frac{\partial X}{\partial r} - \frac{\mu}{r^2}.
* \f] */
mutable Scalar* p_aaa ;
/** Field \f$ \tilde{B}\f$ defined from \f$ h^{rr}, \eta, W\f$ and \e h
* insensitive to the longitudinal part of the \c Sym_tensor.
* It is defined for each multipolar momentum \f$\ell \geq 2\f$ by
* \f[
* \tilde{B} = (\ell + 2) \frac{\partial W}{\partial r} + \ell(\ell + 2)
* \frac{W}{r} - \frac{2\eta}{r^2} + \frac{(\ell +2)T}{2r(\ell + 1)}
* + \frac{1}{2(\ell + 1)} \frac{\partial T}{\partial r} - \frac{h^{rr}}
* {(\ell + 1)r}.
* \f]
*/
mutable Scalar* p_tilde_b ;
/** Field \f$ \tilde{C}\f$ defined from \f$ h^{rr}, \eta, W\f$ and \e h
* insensitive to the longitudinal part of the \c Sym_tensor.
* It is defined for each multipolar momentum \f$\ell \geq 2\f$ by
* \f[
* \tilde{C} = - (\ell - 1) \frac{\partial W}{\partial r} + (\ell + 1)(\ell - 1)
* \frac{W}{r} - \frac{2\eta}{r^2} + \frac{(\ell - 1)T}{2r\ell}
* - \frac{1}{2 \ell } \frac{\partial T}{\partial r} - \frac{h^{rr}}
* {\ell r}.
* \f]
*/
mutable Scalar* p_tilde_c ;
// Constructors - Destructor :
// -------------------------
public:
/** Standard constructor.
*
* @param map the mapping
* @param tipe 1-D array of integers (class \c Itbl ) of size 2
* containing the type
* of each index, \c COV for a covariant one
* and \c CON for a contravariant one, with the
* following storage convention:
* \li \c tipe(0) : type of the first index
* \li \c tipe(1) : type of the second index
* @param triad_i vectorial basis (triad) with respect to which
* the tensor components are defined
*/
Sym_tensor(const Map& map, const Itbl& tipe, const Base_vect& triad_i) ;
/** Standard constructor when both indices are of the same type.
*
* @param map the mapping
* @param tipe the type of the indices.
* @param triad_i vectorial basis (triad) with respect to which
* the tensor components are defined
*
*/
Sym_tensor(const Map& map, int tipe, const Base_vect& triad_i) ;
Sym_tensor(const Sym_tensor& a) ; ///< Copy constructor
/** Constructor from a \c Tensor .
* The symmetry of the input tensor is assumed but is not checked.
*/
Sym_tensor(const Tensor& a) ;
/** Constructor from a file (see \c sauve(FILE*) ).
*
* @param map the mapping
* @param triad_i vectorial basis (triad) with respect to which
* the tensor components are defined. It will
* be checked that it coincides with the basis
* saved in the file.
* @param fich file which has been used by
* the function \c sauve(FILE*) .
*/
Sym_tensor(const Map& map, const Base_vect& triad_i, FILE* fich) ;
virtual ~Sym_tensor() ; ///< Destructor
// Memory management
// -----------------
protected:
virtual void del_deriv() const; ///< Deletes the derived quantities
/// Sets the pointers on derived quantities to 0x0
void set_der_0x0() const ;
/** Logical destructor of the derivatives depending on the i-th
* element of \c met_depend specific to the
* class \c Sym_tensor (\c p_transverse , etc...).
*/
virtual void del_derive_met(int i) const ;
/** Sets all the i-th components of \c met_depend specific to the
* class \c Sym_tensor (\c p_transverse , etc...) to 0x0.
*/
void set_der_met_0x0(int i) const ;
// Mutators / assignment
// ---------------------
public:
/// Assignment to another \c Sym_tensor
virtual void operator=(const Sym_tensor& a) ;
/// Assignment to a \c Tensor_sym
virtual void operator=(const Tensor_sym& a) ;
/**
* Assignment to a \c Tensor .
*
* The symmetry is assumed but not checked.
*/
virtual void operator=(const Tensor& a) ;
/**
* Assigns the derived members \c p_longit_pot and \c p_transverse
* and updates the components accordingly.
* (see the documentation of these derived members for details)
*/
void set_longit_trans( const Vector& v, const Sym_tensor_trans& a) ;
/**
* Assigns the component \f$ T^{rr} \f$ and the derived members
* \c p_eta , \c p_mu , \c p_www, \c p_xxx and \c p_ttt ,
* fro, their values and \f$ \eta / r\f$, \f$\mu / r \f$.
* It updates the other components accordingly.
*/
void set_auxiliary( const Scalar& trr, const Scalar& eta_over_r, const
Scalar& mu_over_r, const Scalar& www, const Scalar&
xxx, const Scalar& ttt ) ;
/** Applies exponential filters to all components
* (see \c Scalar::exponential_filter_r ). Does a loop for Cartesian
* components, and works in terms of the rr-component, \f$\eta\f$,
* \f$\mu\f$, \c W, \c X, \c T for spherical components.
*/
virtual void exponential_filter_r(int lzmin, int lzmax, int p,
double alpha= -16.) ;
/** Applies exponential filters to all components
* (see \c Scalar::exponential_filter_ylm ). Does a loop for Cartesian
* components, and works in terms of the r-component, \f$\eta\f$,
* \f$\mu\f$, \c W, \c X, \c T for spherical components.
*/
virtual void exponential_filter_ylm(int lzmin, int lzmax, int p,
double alpha= -16.) ;
// Computation of derived members
// ------------------------------
public:
/**Returns the divergence of \c this with respect to a \c Metric .
* The indices are assumed to be contravariant.
*/
const Vector& divergence(const Metric&) const ;
/** Computes the Lie derivative of \c this with respect to some
* vector field \c v
*/
Sym_tensor derive_lie(const Vector& v) const ;
/** Computes the transverse part \f${}^t T^{ij}\f$ of the tensor with respect
* to a given metric, transverse meaning divergence-free with respect
* to that metric. Denoting \c *this by \f$T^{ij}\f$, we then have
* \f[
* T^{ij} = {}^t T^{ij} + \nabla^i W^j + \nabla^j W^i
* \qquad\mbox{with}\quad \nabla_j {}^t T^{ij} = 0
*\f]
* where \f$\nabla_i\f$ denotes the covariant derivative with respect
* to the given metric and \f$W^i\f$ is the vector potential of the
* longitudinal part of \f$T^{ij}\f$ (function \c longit_pot() below)
* @param gam metric with respect to the transverse decomposition
* is performed
* @param par parameters for the vector Poisson equation
* @param method_poisson type of method for solving the vector
* Poisson equation to get the longitudinal part (see
* method \c Vector::poisson)
*/
const Sym_tensor_trans& transverse(const Metric& gam, Param* par = 0x0,
int method_poisson = 6) const ;
/** Computes the vector potential \f$W^i\f$ of
* longitudinal part of the tensor (see documentation of
* method \c transverse() above).
* @param gam metric with respect to the transverse decomposition
* is performed
* @param par parameters for the vector Poisson equation
* @param method_poisson type of method for solving the vector
* Poisson equation to get the longitudinal part (see
* method \c Vector::poisson)
*/
const Vector& longit_pot(const Metric& gam, Param* par = 0x0,
int method_poisson = 6) const ;
/// Gives the field \f$\eta\f$ (see member \c p_eta ).
virtual const Scalar& eta(Param* par = 0x0) const ;
/// Gives the field \f$\mu\f$ (see member \c p_mu ).
const Scalar& mu(Param* par = 0x0) const ;
/// Gives the field \e W (see member \c p_www ).
const Scalar& www() const ;
/// Gives the field \e X (see member \c p_xxx ).
const Scalar& xxx() const ;
/// Gives the field \e T (see member \c p_ttt ).
const Scalar& ttt() const ;
/** Gives the field \e A (see member \c p_aaa ).
* @param output_ylm a flag to control the spectral decomposition
* base of the result: if true (default) the spherical harmonics base
* is used.
*/
const Scalar& compute_A(bool output_ylm = true, Param* par = 0x0) const ;
/** Gives the field \f$\tilde{B}\f$ (see member \c p_tilde_b ).
* @param output_ylm a flag to control the spectral decomposition
* base of the result: if true (default) the spherical harmonics base
* is used.
*/
const Scalar& compute_tilde_B(bool output_ylm = true, Param* par = 0x0) const ;
/** Gives the field \f$\tilde{B}\f$ (see member \c p_tilde_b )
* associated with the TT-part of the \c Sym_tensor .
* @param output_ylm a flag to control the spectral decomposition
* base of the result: if true (default) the spherical harmonics base
* is used.
*/
Scalar compute_tilde_B_tt(bool output_ylm = true, Param* par = 0x0) const ;
/** Gives the field \f$\tilde{C}\f$ (see member \c p_tilde_c ).
* @param output_ylm a flag to control the spectral decomposition
* base of the result: if true (default) the spherical harmonics base
* is used.
*/
const Scalar& compute_tilde_C(bool output_ylm = true, Param* par = 0x0) const ;
protected:
/** Computes \f$\tilde{B}\f$ (see \c Sym_tensor::p_tilde_b ) from its
* transverse-traceless part and the trace.
*/
Scalar get_tilde_B_from_TT_trace(const Scalar& tilde_B_tt_in, const Scalar&
trace) const ;
// Mathematical operators
// ----------------------
protected:
/**
* Returns a pointer on the inverse of the \c Sym_tensor
* (seen as a matrix).
*/
Sym_tensor* inverse() const ;
// Friend classes
//-----------------
friend class Metric ;
} ;
//---------------------------------//
// class Sym_tensor_trans //
//---------------------------------//
/**
* Transverse symmetric tensors of rank 2. \ingroup (tensor)
*
* This class is designed to store transverse (divergence-free)
* symmetric contravariant tensors of rank 2,
* with the component expressed in an orthonormal spherical basis
* \f$(e_r,e_\theta,e_\varphi)\f$.
*
*
*/
class Sym_tensor_trans: public Sym_tensor {
// Data :
// -----
protected:
/// Metric with respect to which the divergence and the trace are defined
const Metric* const met_div ;
/// Trace with respect to the metric \c *met_div
mutable Scalar* p_trace ;
/// Traceless part with respect to the metric \c *met_div
mutable Sym_tensor_tt* p_tt ;
// Constructors - Destructor
// -------------------------
public:
/** Standard constructor.
*
* @param map the mapping
* @param triad_i vectorial basis (triad) with respect to which
* the tensor components are defined
* @param met the metric with respect to which the divergence is defined
*/
Sym_tensor_trans(const Map& map, const Base_vect& triad_i,
const Metric& met) ;
Sym_tensor_trans(const Sym_tensor_trans& ) ; ///< Copy constructor
/** Constructor from a file (see \c Tensor::sauve(FILE*) ).
*
* @param map the mapping
* @param triad_i vectorial basis (triad) with respect to which
* the tensor components are defined. It will
* be checked that it coincides with the basis
* saved in the file.
* @param met the metric with respect to which the divergence is defined
* @param fich file which has been used by
* the function \c sauve(FILE*) .
*/
Sym_tensor_trans(const Map& map, const Base_vect& triad_i,
const Metric& met, FILE* fich) ;
virtual ~Sym_tensor_trans() ; ///< Destructor
// Memory management
// -----------------
protected:
virtual void del_deriv() const; ///< Deletes the derived quantities
/// Sets the pointers on derived quantities to 0x0
void set_der_0x0() const ;
// Accessors
// ---------
public:
/** Returns the metric with respect to which the divergence
* and the trace are defined.
*/
const Metric& get_met_div() const {return *met_div ; } ;
// Mutators / assignment
// ---------------------
public:
/// Assignment to another \c Sym_tensor_trans
virtual void operator=(const Sym_tensor_trans& a) ;
/// Assignment to a \c Sym_tensor
virtual void operator=(const Sym_tensor& a) ;
/// Assignment to a \c Tensor_sym
virtual void operator=(const Tensor_sym& a) ;
/// Assignment to a \c Tensor
virtual void operator=(const Tensor& a) ;
/**
* Assigns the derived members \c p_tt and \c p_trace
* and updates the components accordingly.
* (see the documentation of these derived members for details)
*/
void set_tt_trace(const Sym_tensor_tt& a, const Scalar& h,
Param* par = 0x0) ;
// Computational methods
// ---------------------
/// Returns the trace of the tensor with respect to metric \c *met_div
const Scalar& the_trace() const ;
/** Returns the transverse traceless part of the tensor,
* the trace being defined
* with respect to metric \c *met_div
*/
const Sym_tensor_tt& tt_part(Param* par = 0x0) const ;
protected:
/** Solves a system of two coupled first-order PDEs obtained from
* the divergence-free condition (Dirac gauge) and the requirement that
* the potential \e A (see \c Sym_tensor::p_aaa ) has a given value.
* The system reads: \f{eqnarray*}
* \frac{\partial \tilde{\mu}}{\partial r} + \frac{3\tilde{\mu}}{r} + \left(
* \Delta_{\theta\varphi } + 2\right) X &=& 0;\\
* \frac{\partial X}{\partial r} - \frac{\tilde{\mu}}{r} &=& A. \f}
* Note that this is solved only for \f$\ell \geq 2\f$ and that
* \f$\tilde{\mu} = \mu / r\f$ (see \c Sym_tensor::p_mu ).
*
* @param aaa [input] the source \e A
* @param tilde_mu [output] the solution \f$\tilde{\mu}\f$
* @param xxx [output] the solution \e X
* @param par_bc [input] \c Param to control the boundary conditions
*/
void sol_Dirac_A(const Scalar& aaa, Scalar& tilde_mu, Scalar& xxx,
const Param* par_bc = 0x0) const ;
/** Solves a system of three coupled first-order PDEs obtained from
* divergence-free conditions (Dirac gauge) and the requirement that
* the potential \f$\tilde{B}\f$ (see \c Sym_tensor::p_tilde_b ) has
* a given value. The system reads: \f{eqnarray*}
* \frac{\partial T^{rr}}{r} + \frac{3T^{rr}}{r} +\frac{1}{r}
* \Delta_{\theta\varphi } \tilde{\eta} &=& \frac{h}{r};\\
* \frac{\partial \tilde{\eta}}{\partial r} + \frac{3\tilde{\eta}}{r} -
* \frac{T^{rr}}{2r} + \left( \Delta_{\theta\varphi } + 2\right)
* \frac{W}{r} &=& -\frac{h}{2r};\\
* (\ell + 2) \frac{\partial W}{\partial r} + \ell(\ell + 2)
* \frac{W}{r} - \frac{2\tilde{\eta}}{r} + \frac{(\ell +2)T}{2r(\ell + 1)}
* + \frac{1}{2(\ell + 1)} \frac{\partial T}{\partial r} - \frac{T^{rr}}
* {(\ell + 1)r} &=& \tilde{B} - \frac{1}{2(\ell +1)} \frac{\partial h}
* {\partial r} - \frac{\ell +2}{\ell +1} \frac{h}{2r}.\f}
* Note that \f$\tilde{\eta} = \eta / r\f$ (for definitions, see derived
* members of \c Sym_tensor).
*
* @param tilde_b [input] the source \f$\tilde{B}\f$
* @param hh [input] the trace of the tensor
* @param hrr [output] the \e rr component of the result
* @param tilde_eta [output] the solution \f$\tilde{\eta}\f$
* @param www [output] the solution \e W
* @param par_bc [input] \c Param to control the boundary conditions
* @param par_mat [input/output] \c Param in which the operator matrix is
* stored.
*/
void sol_Dirac_tilde_B(const Scalar& tilde_b, const Scalar& hh, Scalar& hrr,
Scalar& tilde_eta, Scalar& www, Param* par_bc=0x0,
Param* par_mat=0x0) const ;
/** Solves the same system as \c Sym_tensor_trans::sol_Dirac_tilde_B
* but only for \f$\ell=0,1\f$. In these particular cases, \e W =0
* the system is simpler and homogeneous solutions are different.
*/
void sol_Dirac_l01(const Scalar& hh, Scalar& hrr, Scalar& tilde_eta,
Param* par_mat) const ;
public:
/** Same resolution as sol_Dirac_A, but with inner boundary conditions added.
*For now, only Robyn-type boundary conditions on \f$\frac {\mu} {r} \f$ can be imposed.
*/
void sol_Dirac_Abound(const Scalar& aaa, Scalar& tilde_mu, Scalar& x_new,
Scalar bound_mu, const Param* par_bc);
/** Same resolution as sol_Dirac_Abound, but here the boundary conditions
* are the degenerate elliptic conditions encontered when solving the
* Kerr problem.
*/
void sol_Dirac_A2(const Scalar& aaa, Scalar& tilde_mu, Scalar& x_new,
Scalar bound_mu, const Param* par_bc);
/** Same resolution as sol_Dirac_tilde_B, but with inner boundary conditions added.
* The difference is here, one has to put B and C values in (and not only \f$\tilde{B}\f$).
* For now, only Robyn-type boundary conditions on \f$ h^{rr} \f$ can be imposed.
*/
void sol_Dirac_BC2(const Scalar& bb, const Scalar& cc, const Scalar& hh,
Scalar& hrr, Scalar& tilde_eta, Scalar& ww, Scalar bound_eta,double dir, double neum, double rhor, Param* par_bc, Param* par_mat);
/** Same resolution as sol_Dirac_Abound, but here the boundary conditions
* are the degenerate elliptic conditions encontered when solving the
* Kerr problem.
*/
void sol_Dirac_BC3(const Scalar& bb, const Scalar& hh,
Scalar& hrr, Scalar& tilde_eta, Scalar& ww, Scalar bound_hrr, Scalar bound_eta, Param* par_bc, Param* par_mat);
// Solving the electric system for l=0 and l=1 only (simpler case), with boundary conditions imposed by the degenerate elliptic system.
void sol_Dirac_l01_bound(const Scalar& hh, Scalar& hrr, Scalar& tilde_eta, Scalar& bound_hrr, Scalar& bound_eta, Param* par_mat) ;
// Provisory: just for compilation, to be removed
void sol_Dirac_l01_2(const Scalar& hh, Scalar& hrr, Scalar& tilde_eta, Param* par_mat) ;
/** Finds spectral potentials A, B, C of solution of an tensorial TT elliptic equation,
* given the source.
**/
void sol_elliptic_ABC(Sym_tensor& source, Scalar aaa, Scalar bbb, Scalar ccc) ;
/** Assigns the derived member \c p_tt and computes the trace so that
* \c *this + the flat metric has a determinant equal to 1. It then
* updates the components accordingly, with a \c dzpuis = 2.
* This function makes an
* iteration until the relative difference in the trace between
* two steps is lower than \c precis .
*
* @param htt the transverse traceless part; all components must have
* dzpuis = 2.
* @param precis relative difference in the trace computation to end
* the iteration.
* @param it_max maximal number of iterations.
*/
void trace_from_det_one(const Sym_tensor_tt& htt,
double precis = 1.e-14, int it_max = 100) ;
/** Assigns the \e rr component and the derived member \f$\mu\f$.
* Other derived members are deduced from the divergence-free
* condition. Finally, it computes \c T (\c Sym_tensor::p_ttt ) so that
* \c *this + the flat metric has a determinant equal to 1. It then
* updates the components accordingly. This function makes an
* iteration until the relative difference in \c T between
* two steps is lower than \c precis .
*
* @param hrr the \e rr component of the tensor,
* @param mu_in the \f$\mu\f$ potential,
* @param precis relative difference in the trace computation to end
* the iteration.
* @param it_max maximal number of iterations.
*/
void set_hrr_mu_det_one(const Scalar& hrr, const Scalar& mu_in,
double precis = 1.e-14, int it_max = 100) ;
/** Assignes the TT-part of the tensor.
* The trace is deduced from the divergence-free condition, through the
* Dirac system on \f$ \tilde{B} \f$, so that
* \c *this + the flat metric has a determinant equal to 1. It then
* updates the components accordingly. This function makes an
* iteration until the relative difference in the trace between
* two steps is lower than \c precis .
* @param hijtt the TT part for \c this.
* @param h_prev a pointer on a guess for the trace of \c *this; if
* null, then the iteration starts from 0.
* @param precis relative difference in the trace computation to end
* the iteration.
* @param it_max maximal number of iterations.
*/
void set_tt_part_det_one(const Sym_tensor_tt& hijtt, const
Scalar* h_prev = 0x0, Param* par_mat = 0x0,
double precis = 1.e-14, int it_max = 100) ;
/** Assigns the derived member \c A and computes \f$\tilde{B}\f$
* from its TT-part (see \c Sym_tensor::compute_tilde_B_tt() ).
* Other derived members are deduced from the divergence-free
* condition. Finally, it computes the trace so that
* \c *this + the flat metric has a determinant equal to 1. It then
* updates the components accordingly. This function makes an
* iteration until the relative difference in the trace between
* two steps is lower than \c precis .
*
* @param a_in the \c A potential (see \c Sym_tensor::p_aaa )
* @param tbtt_in the TT-part of \f$\tilde{B}\f$ potential
* (see \c Sym_tensor::p_tilde_b and \c Sym_tensor::compute_tilde_B_tt() )
* @param h_prev a pointer on a guess for the trace of \c *this; if
* null, then the iteration starts from 0.
* @param precis relative difference in the trace computation to end
* the iteration.
* @param it_max maximal number of iterations.
*/
void set_AtBtt_det_one(const Scalar& a_in, const Scalar& tbtt_in,
const Scalar* h_prev = 0x0, Param* par_bc = 0x0,
Param* par_mat = 0x0, double precis = 1.e-14,
int it_max = 100) ;
/** Assigns the derived members \c A , \f$\tilde{B}\f$ and the trace.
* Other derived members are deduced from the divergence-free condition.
*
* @param a_in the \c A potential (see \c Sym_tensor::p_aaa )
* @param tb_in the \f$\tilde{B}\f$ potential (see \c Sym_tensor::p_tilde_b )
* @param trace the trace of the \c Sym_tensor.
*/
void set_AtB_trace(const Scalar& a_in, const Scalar& tb_in, const
Scalar& trace, Param* par_bc = 0x0, Param* par_mat = 0x0) ;
/** Computes the solution of a tensorial transverse Poisson equation
* with \c *this \f$= S^{ij}\f$ as a source:
* \f[
* \Delta h^{ij} = S^{ij}.
*\f]
* In particular, it makes an iteration on the trace of the result, using
* \c Sym_tensor::set_WX_det_one.
*
* @param h_guess a pointer on a guess for the trace of the result; it is
* passed to \c Sym_tensor::set_WX_det_one.
* @return solution \f$h^{ij}\f$ of the above equation with the boundary
* condition \f$h^{ij}=0\f$ at spatial infinity.
*/
Sym_tensor_trans poisson(const Scalar* h_guess = 0x0) const ;
} ;
//------------------------------//
// class Sym_tensor_tt //
//------------------------------//
/**
* Transverse and traceless symmetric tensors of rank 2.
*
* This class is designed to store transverse (divergence-free)
* and transverse symmetric contravariant tensors of rank 2,
* with the component expressed in an orthonormal spherical basis
* \f$(e_r,e_\theta,e_\varphi)\f$.\ingroup (tensor)
*
*
*/
class Sym_tensor_tt: public Sym_tensor_trans {
// Data :
// -----
protected:
/** Field \f$\chi\f$ such that the component \f$h^{rr} = \frac{\chi}{r^2}\f$.
*/
mutable Scalar* p_khi ;
// Constructors - Destructor
// -------------------------
public:
/** Standard constructor.
*
* @param map the mapping
* @param triad_i vectorial basis (triad) with respect to which
* the tensor components are defined
* @param met the metric with respect to which the divergence is defined
*/
Sym_tensor_tt(const Map& map, const Base_vect& triad_i,
const Metric& met) ;
Sym_tensor_tt(const Sym_tensor_tt& ) ; ///< Copy constructor
/** Constructor from a file (see \c Tensor::sauve(FILE*) ).
*
* @param map the mapping
* @param triad_i vectorial basis (triad) with respect to which
* the tensor components are defined. It will
* be checked that it coincides with the basis
* saved in the file.
* @param met the metric with respect to which the divergence is defined
* @param fich file which has been used by
* the function \c sauve(FILE*) .
*/
Sym_tensor_tt(const Map& map, const Base_vect& triad_i,
const Metric& met, FILE* fich) ;
virtual ~Sym_tensor_tt() ; ///< Destructor
// Memory management
// -----------------
protected:
virtual void del_deriv() const; ///< Deletes the derived quantities
/// Sets the pointers on derived quantities to 0x0
void set_der_0x0() const ;
// Mutators / assignment
// ---------------------
public:
/// Assignment to another \c Sym_tensor_tt
virtual void operator=(const Sym_tensor_tt& a) ;
/// Assignment to a \c Sym_tensor_trans
virtual void operator=(const Sym_tensor_trans& a) ;
/// Assignment to a \c Sym_tensor
virtual void operator=(const Sym_tensor& a) ;
/// Assignment to a \c Tensor_sym
virtual void operator=(const Tensor_sym& a) ;
/// Assignment to a \c Tensor
virtual void operator=(const Tensor& a) ;
/** Sets the component \f$h^{rr}\f$, as well as the angular potentials
* \f$\eta\f$ and \f$\mu\f$ (see members
* \c p_eta and \c p_mu ).
* The other components are updated consistently
* by a call to the method \c update() .
*
* @param hrr [input] value of \f$h^{rr}\f$
* @param eta_i [input] angular potential \f$\eta\f$
* @param mu_i [input] angular potential \f$\mu\f$
*
*/
void set_rr_eta_mu(const Scalar& hrr, const Scalar& eta_i,
const Scalar& mu_i) ;
/** Sets the component \f$h^{rr}\f$, as well as the angular potential
* \f$\mu\f$ (see member \c p_mu ).
* The angular potential \f$\eta\f$ (member \c p_eta ) is deduced from
* the divergence free condition.
* The other tensor components are updated consistently
* by a call to the method \c update() .
*
* @param hrr [input] value of \f$h^{rr}\f$
* @param mu_i [input] angular potential \f$\mu\f$
*
*/
void set_rr_mu(const Scalar& hrr, const Scalar& mu_i) ;
/** Sets the component \f$\chi\f$, as well as the angular potentials
* \f$\eta\f$ and \f$\mu\f$ (see members \c p_khi ,
* \c p_eta and \c p_mu ).
* The components are updated consistently
* by a call to the method \c update() .
*
* @param khi_i [input] value of \f$\chi\f$
* @param eta_i [input] angular potential \f$\eta\f$
* @param mu_i [input] angular potential \f$\mu\f$
*
*/
void set_khi_eta_mu(const Scalar& khi_i, const Scalar& eta_i,
const Scalar& mu_i) ;
/** Sets the component \f$\chi\f$, as well as the angular potential
* \f$\mu\f$ (see member \c p_khi and \c p_mu ).
* The angular potential \f$\eta\f$ (member \c p_eta ) is deduced from
* the divergence free condition.
* The tensor components are updated consistently
* by a call to the method \c update() .
*
* @param khi_i [input] value of \f$\chi\f$
* @param mu_i [input] angular potential \f$\mu\f$
* @param dzp [input] \c dzpuis parameter of the resulting
* tensor components
*
*/
void set_khi_mu(const Scalar& khi_i, const Scalar& mu_i, int dzp = 0,
Param* par1 = 0x0, Param* par2 = 0x0,
Param* par3 = 0x0) ;
/** Assigns the derived members \c A and \f$\tilde{B}\f$.
* Other derived members are deduced from the divergence-and trace-free
* conditions.
*
* @param a_in the \c A potential (see \c Sym_tensor::p_aaa )
* @param tb_in the \f$\tilde{B}\f$ potential (see \c Sym_tensor::p_tilde_b )
*/
void set_A_tildeB(const Scalar& a_in, const Scalar& tb_in, Param* par_bc = 0x0,
Param* par_mat = 0x0) ;
// Computational methods
// ---------------------
public:
/** Gives the field \f$\chi\f$ such that the component
* \f$h^{rr} = \frac{\chi}{r^2}\f$.
*/
const Scalar& khi() const ;
/// Gives the field \f$\eta\f$ (see member \c p_eta ).
virtual const Scalar& eta(Param* par = 0x0) const ;
protected:
/** Computes the components \f$h^{r\theta}\f$, \f$h^{r\varphi}\f$,
* \f$h^{\theta\theta}\f$, \f$h^{\theta\varphi}\f$ and \f$h^{\varphi\varphi}\f$,
* from \f$h^{rr}\f$ and the potentials \f$\eta\f$ and \f$\mu\f$.
* @param dzp \c dzpuis parameter of the result, i.e. of the
* components \f$ h^{ij} \f$.
*/
void update(int dzp, Param* par1 = 0x0, Param* par2 = 0x0) ;
public:
/** Computes the solution of a tensorial TT Poisson equation
* with \c *this \f$= S^{ij}\f$ as a source:
* \f[
* \Delta h^{ij} = S^{ij}
*\f]
*
* @param dzfin [input] the \c dzpuis for all the components of the result
* (see the documentation for \c Scalar ).
* @return solution \f$h^{ij}\f$ of the above equation with the boundary
* condition \f$h^{ij}=0\f$ at spatial infinity.
*/
Sym_tensor_tt poisson(int dzfin = 2) const ;
} ;
}
#endif
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