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Szekeres · source-snapshot-bc3404156f6e
已登记出处中的最早位置:§18.1 · zh-CN。
来源短摘录与定位
§18.1 · zh-CN · translation · unreviewed
对每个 1-形式 和向量场 。 的张量性质由对两个自变量的线性性推出。对 的线性性是平凡的,而对 的线性性则直接由 (Con1) 和 (Con2) 推出。张量场 称为向量场 的 协变导数(covariant derivative)。这里所描述的联络理论称为 科苏尔联络(Koszul connection) [1–6],而将在下文推导出的“老式”坐标版本则见于 [7, 8] 等文献。
§18.1 · en · original_transcription · unreviewed
for every 1-form and vector field . The tensor nature of follows from linearity in both arguments. Linearity in is trivial, while linearity in follows immediately from (Con1) and (Con2). The tensor field is called the covariant derivative of the vector field . The theory of connections as described here is called a Koszul connection [1–6], while the ‘old-fashioned’ coordinate version that will be deduced below appears in texts such as [7, 8].