/usr/include/boost/math/special_functions/ is in libboost1.46-dev 1.46.1-7ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/boost/math/special_functions/acosh.hpp
/usr/include/boost/math/special_functions/asinh.hpp
/usr/include/boost/math/special_functions/atanh.hpp
/usr/include/boost/math/special_functions/bessel.hpp
/usr/include/boost/math/special_functions/beta.hpp
/usr/include/boost/math/special_functions/binomial.hpp
/usr/include/boost/math/special_functions/cbrt.hpp
/usr/include/boost/math/special_functions/cos_pi.hpp
/usr/include/boost/math/special_functions/detail/
/usr/include/boost/math/special_functions/detail/bessel_i0.hpp
/usr/include/boost/math/special_functions/detail/bessel_i1.hpp
/usr/include/boost/math/special_functions/detail/bessel_ik.hpp
/usr/include/boost/math/special_functions/detail/bessel_j0.hpp
/usr/include/boost/math/special_functions/detail/bessel_j1.hpp
/usr/include/boost/math/special_functions/detail/bessel_jn.hpp
/usr/include/boost/math/special_functions/detail/bessel_jy.hpp
/usr/include/boost/math/special_functions/detail/bessel_jy_asym.hpp
/usr/include/boost/math/special_functions/detail/bessel_k0.hpp
/usr/include/boost/math/special_functions/detail/bessel_k1.hpp
/usr/include/boost/math/special_functions/detail/bessel_kn.hpp
/usr/include/boost/math/special_functions/detail/bessel_y0.hpp
/usr/include/boost/math/special_functions/detail/bessel_y1.hpp
/usr/include/boost/math/special_functions/detail/bessel_yn.hpp
/usr/include/boost/math/special_functions/detail/erf_inv.hpp
/usr/include/boost/math/special_functions/detail/fp_traits.hpp
/usr/include/boost/math/special_functions/detail/gamma_inva.hpp
/usr/include/boost/math/special_functions/detail/ibeta_inv_ab.hpp
/usr/include/boost/math/special_functions/detail/ibeta_inverse.hpp
/usr/include/boost/math/special_functions/detail/iconv.hpp
/usr/include/boost/math/special_functions/detail/igamma_inverse.hpp
/usr/include/boost/math/special_functions/detail/igamma_large.hpp
/usr/include/boost/math/special_functions/detail/lanczos_sse2.hpp
/usr/include/boost/math/special_functions/detail/lgamma_small.hpp
/usr/include/boost/math/special_functions/detail/round_fwd.hpp
/usr/include/boost/math/special_functions/detail/t_distribution_inv.hpp
/usr/include/boost/math/special_functions/detail/unchecked_factorial.hpp
/usr/include/boost/math/special_functions/digamma.hpp
/usr/include/boost/math/special_functions/ellint_1.hpp
/usr/include/boost/math/special_functions/ellint_2.hpp
/usr/include/boost/math/special_functions/ellint_3.hpp
/usr/include/boost/math/special_functions/ellint_rc.hpp
/usr/include/boost/math/special_functions/ellint_rd.hpp
/usr/include/boost/math/special_functions/ellint_rf.hpp
/usr/include/boost/math/special_functions/ellint_rj.hpp
/usr/include/boost/math/special_functions/erf.hpp
/usr/include/boost/math/special_functions/expint.hpp
/usr/include/boost/math/special_functions/expm1.hpp
/usr/include/boost/math/special_functions/factorials.hpp
/usr/include/boost/math/special_functions/fpclassify.hpp
/usr/include/boost/math/special_functions/gamma.hpp
/usr/include/boost/math/special_functions/hermite.hpp
/usr/include/boost/math/special_functions/hypot.hpp
/usr/include/boost/math/special_functions/laguerre.hpp
/usr/include/boost/math/special_functions/lanczos.hpp
/usr/include/boost/math/special_functions/legendre.hpp
/usr/include/boost/math/special_functions/log1p.hpp
/usr/include/boost/math/special_functions/math_fwd.hpp
/usr/include/boost/math/special_functions/modf.hpp
/usr/include/boost/math/special_functions/next.hpp
/usr/include/boost/math/special_functions/pow.hpp
/usr/include/boost/math/special_functions/powm1.hpp
/usr/include/boost/math/special_functions/prime.hpp
/usr/include/boost/math/special_functions/round.hpp
/usr/include/boost/math/special_functions/sign.hpp
/usr/include/boost/math/special_functions/sin_pi.hpp
/usr/include/boost/math/special_functions/sinc.hpp
/usr/include/boost/math/special_functions/sinhc.hpp
/usr/include/boost/math/special_functions/spherical_harmonic.hpp
/usr/include/boost/math/special_functions/sqrt1pm1.hpp
/usr/include/boost/math/special_functions/trunc.hpp
/usr/include/boost/math/special_functions/zeta.hpp