/usr/include/eigen3/unsupported/ is in libeigen3-dev 3.0.5-1.
This file is owned by root:root, with mode 0o755.
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/usr/include/eigen3/unsupported/Eigen/
/usr/include/eigen3/unsupported/Eigen/AdolcForward
/usr/include/eigen3/unsupported/Eigen/AlignedVector3
/usr/include/eigen3/unsupported/Eigen/AutoDiff
/usr/include/eigen3/unsupported/Eigen/BVH
/usr/include/eigen3/unsupported/Eigen/CholmodSupport
/usr/include/eigen3/unsupported/Eigen/FFT
/usr/include/eigen3/unsupported/Eigen/IterativeSolvers
/usr/include/eigen3/unsupported/Eigen/MPRealSupport
/usr/include/eigen3/unsupported/Eigen/MatrixFunctions
/usr/include/eigen3/unsupported/Eigen/MoreVectorization
/usr/include/eigen3/unsupported/Eigen/NonLinearOptimization
/usr/include/eigen3/unsupported/Eigen/NumericalDiff
/usr/include/eigen3/unsupported/Eigen/OpenGLSupport
/usr/include/eigen3/unsupported/Eigen/Polynomials
/usr/include/eigen3/unsupported/Eigen/Skyline
/usr/include/eigen3/unsupported/Eigen/SparseExtra
/usr/include/eigen3/unsupported/Eigen/SuperLUSupport
/usr/include/eigen3/unsupported/Eigen/UmfPackSupport
/usr/include/eigen3/unsupported/Eigen/src/
/usr/include/eigen3/unsupported/Eigen/src/AutoDiff/
/usr/include/eigen3/unsupported/Eigen/src/AutoDiff/AutoDiffJacobian.h
/usr/include/eigen3/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
/usr/include/eigen3/unsupported/Eigen/src/AutoDiff/AutoDiffVector.h
/usr/include/eigen3/unsupported/Eigen/src/BVH/
/usr/include/eigen3/unsupported/Eigen/src/BVH/BVAlgorithms.h
/usr/include/eigen3/unsupported/Eigen/src/BVH/KdBVH.h
/usr/include/eigen3/unsupported/Eigen/src/FFT/
/usr/include/eigen3/unsupported/Eigen/src/FFT/ei_fftw_impl.h
/usr/include/eigen3/unsupported/Eigen/src/FFT/ei_kissfft_impl.h
/usr/include/eigen3/unsupported/Eigen/src/IterativeSolvers/
/usr/include/eigen3/unsupported/Eigen/src/IterativeSolvers/ConstrainedConjGrad.h
/usr/include/eigen3/unsupported/Eigen/src/IterativeSolvers/IterationController.h
/usr/include/eigen3/unsupported/Eigen/src/MatrixFunctions/
/usr/include/eigen3/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
/usr/include/eigen3/unsupported/Eigen/src/MatrixFunctions/MatrixFunction.h
/usr/include/eigen3/unsupported/Eigen/src/MatrixFunctions/MatrixFunctionAtomic.h
/usr/include/eigen3/unsupported/Eigen/src/MatrixFunctions/StemFunction.h
/usr/include/eigen3/unsupported/Eigen/src/MoreVectorization/
/usr/include/eigen3/unsupported/Eigen/src/MoreVectorization/MathFunctions.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/HybridNonLinearSolver.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/LevenbergMarquardt.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/chkder.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/covar.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/dogleg.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/fdjac1.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/lmpar.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/qrsolv.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/r1mpyq.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/r1updt.h
/usr/include/eigen3/unsupported/Eigen/src/NonLinearOptimization/rwupdt.h
/usr/include/eigen3/unsupported/Eigen/src/NumericalDiff/
/usr/include/eigen3/unsupported/Eigen/src/NumericalDiff/NumericalDiff.h
/usr/include/eigen3/unsupported/Eigen/src/Polynomials/
/usr/include/eigen3/unsupported/Eigen/src/Polynomials/Companion.h
/usr/include/eigen3/unsupported/Eigen/src/Polynomials/PolynomialSolver.h
/usr/include/eigen3/unsupported/Eigen/src/Polynomials/PolynomialUtils.h
/usr/include/eigen3/unsupported/Eigen/src/Skyline/
/usr/include/eigen3/unsupported/Eigen/src/Skyline/SkylineInplaceLU.h
/usr/include/eigen3/unsupported/Eigen/src/Skyline/SkylineMatrix.h
/usr/include/eigen3/unsupported/Eigen/src/Skyline/SkylineMatrixBase.h
/usr/include/eigen3/unsupported/Eigen/src/Skyline/SkylineProduct.h
/usr/include/eigen3/unsupported/Eigen/src/Skyline/SkylineStorage.h
/usr/include/eigen3/unsupported/Eigen/src/Skyline/SkylineUtil.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/Amd.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/CholmodSupport.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/CholmodSupportLegacy.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/RandomSetter.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/SimplicialCholesky.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/Solve.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/SparseLDLTLegacy.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/SparseLLT.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/SparseLU.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/SuperLUSupport.h
/usr/include/eigen3/unsupported/Eigen/src/SparseExtra/UmfPackSupport.h