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Szekeres · source-snapshot-bc3404156f6e
已登记出处中的最早位置:§19.5 · zh-CN。
来源短摘录与定位
§19.5 · zh-CN · translation · unreviewed
黎曼张量具有这种形式的空间称为常曲率(constant curvature)空间。例18.4为这一命名提供了另一动机,并表明半径为的三维球面是常曲率空间,且。反之亦然——每个常曲率空间都具有最大对称性。我们在以下例子中给出这一命题的几个实例。
§19.5 · en · original_transcription · unreviewed
Spaces whose Riemann tensor has this form are known as spaces of constant curvature. Example 18.4 provides another motivation for this nomenclature and shows that the 3-sphere of radius is a space of constant curvature, with . The converse is in fact true – every space of constant curvature has maximal symmetry. We give a few instances of this statement in the following examples.