= Affine differential geometry
{wiki=Affine_differential_geometry}
Affine differential geometry is a branch of mathematics that studies the properties and structures of affine manifolds, which are manifolds equipped with an affine connection. Unlike Riemannian geometry, which relies on the notion of a metric to define geometric properties like lengths and angles, affine differential geometry primarily focuses on the properties that are invariant under affine transformations, such as parallel transport and affine curvature.
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