26 #ifndef __CHANGE_VAR_H_
27 #define __CHANGE_VAR_H_
62 double zero (
double) ;
68 double part_ln (
double) ;
69 double part_ln_der (
double) ;
74 double plus_log(
double) ;
75 double moins_sur(
double) ;
78 double moins_log(
double) ;
79 double plus_sur(
double) ;
101 double (* func_F) (double) ;
146 double val_F (
double x) ;
148 double val_G (
double x) ;
double(* der_G)(double)
Pointer on the function .
double add_F
Multiplicative factor for F ## PROVISORY.
double(* func_G)(double)
Pointer on the derivative of .
double mult_F
Pointer on the derivative of .
double val_F(double x)
Standard destructor.
double val_der_G(double x)
Returns the value of at {\tt x}.
~Change_var()
Constructor by copy.
Change_var(int var)
Additive factor for F ## PROVISORY.
double val_der_F(double x)
Returns the value of at {\tt x}.
double val_G(double x)
Returns the value of at {\tt x}.
double(* der_F)(double)
Pointer on the function .
This class defines a variable change to be used when solving elliptic equations.