escript
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#include <Functions.h>
Public Member Functions | |
Function (const escript::JMPI &mpi_info) | |
virtual | ~Function () |
virtual SolverResult | call (double *value, const double *arg, Performance *pp)=0 |
sets value=F(arg) More... | |
SolverResult | derivative (double *J0w, const double *w, const double *f0, const double *x0, double *setoff, Performance *pp) |
virtual dim_t | getLen ()=0 |
returns the length of the vectors used by this function More... | |
Public Attributes | |
const escript::JMPI | mpi_info |
paso::Function::Function | ( | const escript::JMPI & | mpi_info | ) |
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virtual |
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pure virtual |
sets value=F(arg)
Implemented in paso::LinearSystem.
Referenced by derivative(), and paso::Solver_NewtonGMRES().
SolverResult paso::Function::derivative | ( | double * | J0w, |
const double * | w, | ||
const double * | f0, | ||
const double * | x0, | ||
double * | setoff, | ||
Performance * | pp | ||
) |
numerical calculation of the directional derivative J0w of F at x0 in the direction w. f0 is the value of F at x0. setoff is workspace
References call(), paso::EPSILON, escript::fabs(), getLen(), paso::util::linearCombination(), paso::util::lsup(), MPI_DOUBLE, mpi_info, MPI_MAX, paso::NoError, escript::DataTypes::real_t_eps(), paso::util::update(), and paso::util::zeroes().
Referenced by paso::Solver_GMRES2().
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pure virtual |
returns the length of the vectors used by this function
Implemented in paso::LinearSystem.
Referenced by derivative(), paso::Solver_GMRES2(), and paso::Solver_NewtonGMRES().
const escript::JMPI paso::Function::mpi_info |
Referenced by derivative(), paso::Solver_GMRES2(), and paso::Solver_NewtonGMRES().