- void *id;
- int index;
- double (* func_f) (lmm_variable var, double x); /* f */
- double (* func_fp) (lmm_variable var, double x); /* f' */
- double (* func_fpi) (lmm_variable var, double x); /* (f')^{-1} */
- double (* func_fpip) (lmm_variable var, double x); /* ((f')^{-1})' */
- double func_fi;
+ double (* func_fpi) (struct lmm_variable *var, double x); /* (f')^{-1} */
+ /* \end{For Lagrange only} */