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--- test:t1 [2013/09/29 22:57] – created admin
+++ test:t1 [2025/09/02 10:55] (current) – removed admin
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-====== Definition ======
-===== coordinate system =====
-a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of a point or other geometric element on a manifold such as Euclidean space.(Wikipedia)
-===== coordinate change =====
-A coordinate change is a set of functions $f^r(x^1, ..., x^N)$ $(r = 1, ..., N)$.
-It assigns a new set of coordinates $(x'^1, ..., x'^N)$ to a point $(x^1, ..., x^N)$, wit $x'^r = f^r(x^1, ..., x^N)$ $(r = 1, ..., N)$.