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# Cylindrical Coordinates
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Meep supports the simulation of Maxwell's equations in cylindrical coordinates for structures that have continuous rotational symmetry around the *z* axis. This reduces problems in 3d to 2d, and 2d to 1d, if there is sufficient symmetry.
Additional resources:
- [Exploiting Symmetry](Exploiting_Symmetry.md)
- [Python Tutorial/Ring Resonator in Cylindrical Coordinates](Python_Tutorials/Ring_Resonator_in_Cylindrical_Coordinates.md)
- [Scheme Tutorial/Ring Resonator in Cylindrical Coordinates](Scheme_Tutorials/Ring_Resonator_in_Cylindrical_Coordinates.md)
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