/usr/include/fflas-ffpack/fflas/fflas_sparse/ is in fflas-ffpack-common 2.2.2-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/fflas-ffpack/fflas/fflas_sparse/coo/
/usr/include/fflas-ffpack/fflas/fflas_sparse/coo.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/coo/coo_spmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/coo/coo_spmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/coo/coo_utils.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr/
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr/csr_pspmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr/csr_pspmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr/csr_spmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr/csr_spmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr/csr_utils.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr_hyb/
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr_hyb.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr_hyb/csr_hyb_pspmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr_hyb/csr_hyb_pspmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr_hyb/csr_hyb_spmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr_hyb/csr_hyb_spmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/csr_hyb/csr_hyb_utils.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell/
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell/ell_pspmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell/ell_pspmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell/ell_spmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell/ell_spmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell/ell_utils.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell_simd/
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell_simd.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell_simd/ell_simd_pspmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell_simd/ell_simd_spmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/ell_simd/ell_simd_utils.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/hyb_zo/
/usr/include/fflas-ffpack/fflas/fflas_sparse/hyb_zo.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/hyb_zo/hyb_zo_pspmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/hyb_zo/hyb_zo_pspmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/hyb_zo/hyb_zo_spmm.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/hyb_zo/hyb_zo_spmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/hyb_zo/hyb_zo_utils.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/read_sparse.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/sell/
/usr/include/fflas-ffpack/fflas/fflas_sparse/sell.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/sell/sell_pspmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/sell/sell_spmv.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/sell/sell_utils.inl
/usr/include/fflas-ffpack/fflas/fflas_sparse/sparse_matrix_traits.h
/usr/include/fflas-ffpack/fflas/fflas_sparse/utils.h