Ford circle is based on Golden Ratio.
These circles are tangent.
C(p/q), C(r/s), C((r-p)/(s-q))=C(1/0)
∴
ps-qr=±1
Then, you see that circles are the convergence.
τ is the Golden Ratio.
You also think about irrational numbers (ω), and this is zero (∞)=C(1/0).
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