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Figure 7
Polar plot r versus θ (in radians) for the spirals of modulus m = 8 (red, middle), m = 10 (green, bottom) and m = 12 (blue, top). Note the observed simple proportionality [r\propto\theta] (overall, approximate) characteristic for an Archimedean spiral. Note, also, the broken order in terms of the value of the slope, with the curve for m = 10 featuring the smallest value, thereby indicating a non-unique rule for the spiral's generation.

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ISSN: 2053-2733
Volume 78| Part 1| January 2022| Pages 21-35
https://doi.org/10.1107/S2053273321012237
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