/usr/include/dolfin/la/ is in libdolfin-dev 1.4.0+dfsg-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/dolfin/la/BlockMatrix.h
/usr/include/dolfin/la/BlockVector.h
/usr/include/dolfin/la/CholmodCholeskySolver.h
/usr/include/dolfin/la/CoordinateMatrix.h
/usr/include/dolfin/la/DefaultFactory.h
/usr/include/dolfin/la/EpetraFactory.h
/usr/include/dolfin/la/EpetraKrylovSolver.h
/usr/include/dolfin/la/EpetraLUSolver.h
/usr/include/dolfin/la/EpetraMatrix.h
/usr/include/dolfin/la/EpetraVector.h
/usr/include/dolfin/la/GenericLUSolver.h
/usr/include/dolfin/la/GenericLinearAlgebraFactory.h
/usr/include/dolfin/la/GenericLinearOperator.h
/usr/include/dolfin/la/GenericLinearSolver.h
/usr/include/dolfin/la/GenericMatrix.h
/usr/include/dolfin/la/GenericPreconditioner.h
/usr/include/dolfin/la/GenericSparsityPattern.h
/usr/include/dolfin/la/GenericTensor.h
/usr/include/dolfin/la/GenericVector.h
/usr/include/dolfin/la/KrylovSolver.h
/usr/include/dolfin/la/LUSolver.h
/usr/include/dolfin/la/LinearAlgebraObject.h
/usr/include/dolfin/la/LinearOperator.h
/usr/include/dolfin/la/LinearSolver.h
/usr/include/dolfin/la/MUMPSLUSolver.h
/usr/include/dolfin/la/Matrix.h
/usr/include/dolfin/la/PETScBaseMatrix.h
/usr/include/dolfin/la/PETScCuspFactory.h
/usr/include/dolfin/la/PETScFactory.h
/usr/include/dolfin/la/PETScKrylovSolver.h
/usr/include/dolfin/la/PETScLUSolver.h
/usr/include/dolfin/la/PETScLinearOperator.h
/usr/include/dolfin/la/PETScMatrix.h
/usr/include/dolfin/la/PETScObject.h
/usr/include/dolfin/la/PETScOptions.h
/usr/include/dolfin/la/PETScPreconditioner.h
/usr/include/dolfin/la/PETScUserPreconditioner.h
/usr/include/dolfin/la/PETScVector.h
/usr/include/dolfin/la/PaStiXLUSolver.h
/usr/include/dolfin/la/SLEPcEigenSolver.h
/usr/include/dolfin/la/STLFactory.h
/usr/include/dolfin/la/STLFactoryCSC.h
/usr/include/dolfin/la/STLMatrix.h
/usr/include/dolfin/la/STLVector.h
/usr/include/dolfin/la/Scalar.h
/usr/include/dolfin/la/SparsityPattern.h
/usr/include/dolfin/la/TensorLayout.h
/usr/include/dolfin/la/TrilinosPreconditioner.h
/usr/include/dolfin/la/UmfpackLUSolver.h
/usr/include/dolfin/la/Vector.h
/usr/include/dolfin/la/VectorSpaceBasis.h
/usr/include/dolfin/la/dolfin_la.h
/usr/include/dolfin/la/solve.h
/usr/include/dolfin/la/uBLASDenseMatrix.h
/usr/include/dolfin/la/uBLASDummyPreconditioner.h
/usr/include/dolfin/la/uBLASFactory.h
/usr/include/dolfin/la/uBLASILUPreconditioner.h
/usr/include/dolfin/la/uBLASKrylovSolver.h
/usr/include/dolfin/la/uBLASLinearOperator.h
/usr/include/dolfin/la/uBLASMatrix.h
/usr/include/dolfin/la/uBLASPreconditioner.h
/usr/include/dolfin/la/uBLASSparseMatrix.h
/usr/include/dolfin/la/uBLASVector.h
/usr/include/dolfin/la/ublas.h