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A **spherical 3-manifold** is a type of three-dimensional manifold that is topologically equivalent to a quotient of the 3-dimensional sphere \( S^3 \) by a group of isometries (which preserve distances). More formally, a spherical 3-manifold can be described as a space of the form \( S^3 / G \), where \( G \) is a group of finite isometries of the 3-sphere.

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