Definition:Isometry (Riemannian Manifolds)

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This page is about Isometry in the context of Inner Product Space. For other uses, see Isometry.

Definition

Let $\struct {M, g}$ and $\struct {\tilde M, \tilde g}$ be Riemannian manifolds with Riemannian metrics $g$ and $\tilde g$ respectively.

Let the mapping $\phi : M \to \tilde M$ be a diffeomorphism such that:

$\phi^* \tilde g = g$


Then $\phi$ is called an isometry (from $\struct {M, g}$ to $\struct {\tilde M, \tilde g}$).


Sources