/usr/include/ITK-4.5/mathews/adaquad.h is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | extern int v3p_netlib_adaptquad_(
v3p_netlib_doublereal (*f)(v3p_netlib_doublereal*),
v3p_netlib_doublereal *a,
v3p_netlib_doublereal *b,
v3p_netlib_doublereal *tol,
v3p_netlib_doublereal *srmat,
v3p_netlib_doublereal *integral,
v3p_netlib_doublereal *errbdd,
v3p_netlib_integer *m,
v3p_netlib_integer *state
);
extern int v3p_netlib_refine_(
v3p_netlib_doublereal (*f)(v3p_netlib_doublereal*),
v3p_netlib_integer *p,
v3p_netlib_doublereal *srmat,
v3p_netlib_integer *m,
v3p_netlib_integer *state
);
extern int v3p_netlib_srule_(
v3p_netlib_doublereal (*f)(v3p_netlib_doublereal*),
v3p_netlib_doublereal *a,
v3p_netlib_doublereal *b,
v3p_netlib_doublereal *tol0,
v3p_netlib_doublereal *srvec
);
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