Flatter
发表于 2025-3-30 09:18:59
Locally Euclidean Spacesare functions of the coordinates y.. The functions g. = g. make a symmetric tensor, the .. As we shall see, it is this tensor that determines the type of coordinates used and the space in which they are embedded.
Grating
发表于 2025-3-30 13:41:32
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libertine
发表于 2025-3-30 17:21:30
Book 1980tively few revisions were necessary for the English edition. They were made early in 1979 and affected about 5% of the text. The main revisions referred to the distance scale, the dlstribution of galaxies, the X-ray observations of clusters, the cosmic time evolution of quasars and radiogalaxies and