/usr/include/CGAL/Algebraic_kernel_d/ is in libcgal-dev 4.11-2build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/CGAL/Algebraic_kernel_d/Algebraic_curve_kernel_2.h
/usr/include/CGAL/Algebraic_kernel_d/Algebraic_real_d_1.h
/usr/include/CGAL/Algebraic_kernel_d/Algebraic_real_quadratic_refinement_rep_bfi.h
/usr/include/CGAL/Algebraic_kernel_d/Algebraic_real_rep.h
/usr/include/CGAL/Algebraic_kernel_d/Algebraic_real_rep_bfi.h
/usr/include/CGAL/Algebraic_kernel_d/Bitstream_coefficient_kernel.h
/usr/include/CGAL/Algebraic_kernel_d/Bitstream_coefficient_kernel_at_alpha.h
/usr/include/CGAL/Algebraic_kernel_d/Bitstream_descartes.h
/usr/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_E08_tree.h
/usr/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_rndl_tree.h
/usr/include/CGAL/Algebraic_kernel_d/Bitstream_descartes_rndl_tree_traits.h
/usr/include/CGAL/Algebraic_kernel_d/Curve_analysis_2.h
/usr/include/CGAL/Algebraic_kernel_d/Curve_pair_analysis_2.h
/usr/include/CGAL/Algebraic_kernel_d/Descartes.h
/usr/include/CGAL/Algebraic_kernel_d/Event_line_builder.h
/usr/include/CGAL/Algebraic_kernel_d/Float_traits.h
/usr/include/CGAL/Algebraic_kernel_d/Interval_evaluate_1.h
/usr/include/CGAL/Algebraic_kernel_d/Interval_evaluate_2.h
/usr/include/CGAL/Algebraic_kernel_d/LRU_hashed_map.h
/usr/include/CGAL/Algebraic_kernel_d/Real_embeddable_extension.h
/usr/include/CGAL/Algebraic_kernel_d/Real_roots.h
/usr/include/CGAL/Algebraic_kernel_d/Shear_controller.h
/usr/include/CGAL/Algebraic_kernel_d/Shear_transformation.h
/usr/include/CGAL/Algebraic_kernel_d/Status_line_CA_1.h
/usr/include/CGAL/Algebraic_kernel_d/Status_line_CPA_1.h
/usr/include/CGAL/Algebraic_kernel_d/Xy_coordinate_2.h
/usr/include/CGAL/Algebraic_kernel_d/algebraic_curve_kernel_2_tools.h
/usr/include/CGAL/Algebraic_kernel_d/bound_between_1.h
/usr/include/CGAL/Algebraic_kernel_d/construct_binary.h
/usr/include/CGAL/Algebraic_kernel_d/enums.h
/usr/include/CGAL/Algebraic_kernel_d/exceptions.h
/usr/include/CGAL/Algebraic_kernel_d/flags.h
/usr/include/CGAL/Algebraic_kernel_d/macros.h
/usr/include/CGAL/Algebraic_kernel_d/refine_zero_against.h
/usr/include/CGAL/Algebraic_kernel_d/shear.h
/usr/include/CGAL/Algebraic_kernel_d/univariate_polynomial_utils.h