"""
Package for differential geometry.
"""

from .diffgeom import (BaseCovarDerivativeOp, BaseScalarField, BaseVectorField,
                       Commutator, CoordSystem, CovarDerivativeOp,
                       Differential, LieDerivative, Manifold, Patch, Point,
                       TensorProduct, WedgeProduct, contravariant_order,
                       covariant_order, intcurve_diffequ, intcurve_series,
                       metric_to_Christoffel_1st, metric_to_Christoffel_2nd,
                       metric_to_Ricci_components,
                       metric_to_Riemann_components, twoform_to_matrix,
                       vectors_in_basis)
