平息 发表于 2025-3-25 04:16:45
https://doi.org/10.1007/978-3-662-11614-2dian geometry. Indeed, in the last chapter we saw how we get several models for the Euclidian plane. One of them was given by representing the points as the points in the interior of a fixed circle, and letting the lines be circle arcs with the cord along a diameter of the fixed circle.不可接触 发表于 2025-3-25 10:53:40
http://reply.papertrans.cn/39/3838/383742/383742_22.pngGRIN 发表于 2025-3-25 13:17:06
http://reply.papertrans.cn/39/3838/383742/383742_23.png愤慨点吧 发表于 2025-3-25 17:26:36
Models for Non-Euclidian Geometrydian geometry. Indeed, in the last chapter we saw how we get several models for the Euclidian plane. One of them was given by representing the points as the points in the interior of a fixed circle, and letting the lines be circle arcs with the cord along a diameter of the fixed circle.公理 发表于 2025-3-25 23:26:49
http://reply.papertrans.cn/39/3838/383742/383742_25.png启发 发表于 2025-3-26 01:59:33
Einleitung und Aufgabenstellung, a web of small and, it would seem, insignificant neolithic villages, impressive cities formed in the river valleys of the Indus, the Euphrates-Tigris and the Nile. Spreading out to form nets with other, in part more peripheral, urban centers, the classical civilizations bearing their names were boramygdala 发表于 2025-3-26 05:42:16
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http://reply.papertrans.cn/39/3838/383742/383742_29.pngchastise 发表于 2025-3-26 19:17:48
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