x = sin(3t), y = sin(4t)
A Lissajous figure at a 3:4 frequency ratio — the closed curve of two harmonics in perfect relationship.
Two harmonics dancing in perfect ratio
Part of: JOY
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r(θ) = a + b·cos(nθ), a > b
P(x,y) ~ Uniform(Ω), N >> 1
f(r,θ) = cos(nθ + αr)
I(r,θ) = I₀ · (1/r) · Σ δ(θ - 2πn/N)