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The origin is the point where all coordinates are zero.



This may be the point 0 on the x-axis, y-axis, and z-axis. It is usually denoted with an O.


Exemple 1


Example 2

In the complex plane, you can also denote any point z = x + iy by its rectangular coordinates (x, iy)


Example 3

In spacetime diagrams, you can denote an event with the coordinates (x, ct).


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