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- exponential map (Riemannian geometry) for a manifold with a Riemannian metric,
- exponential map (Lie theory) from a Lie algebra to a Lie group,
- More generally, in a manifold with an affine connection, , where is a geodesic with initial velocity X, is sometimes also called the exponential map. The above two are special cases of this with respect to appropriate affine connections.
- Euler's formula forming the unit circle in the complex plane.