Symmetry of a Mystery Curve

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This Demonstration shows graphs of the function , where
,
, and
are complex coefficients and the frequencies
,
, and
are integers. In particular, for the frequencies 1, 6, and -14, the curve has five-fold symmetry.
Contributed by: Izidor Hafner (January 2016)
(Based on the work of Frank A. Farris)
Open content licensed under CC BY-NC-SA
Snapshots
Details
The following theorem is shown [1, pp. 13]:
Suppose that and
are integers and that all the frequency numbers
in the finite sum
satisfy .
Then, for any choice of the coefficients ,
satisfies the symmetry condition
for all
.
Reference
[1] F. A. Farris, Creating Symmetry: The Artful Mathematics of Wallpaper Patterns, Princeton: Princeton University Press, 2015.
Permanent Citation