bn:01974575n
Noun Concept
Categories: Quantum gravity, 4-manifolds, Riemannian manifolds, Mathematical physics
EN
gravitational instanton  ALE space  ALG space  asymptotically locally Euclidean  asymptotically locally flat
EN
In mathematical physics and differential geometry, a gravitational instanton is a four-dimensional complete Riemannian manifold satisfying the vacuum Einstein equations. Wikipedia
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