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Research . 2026
License: CC BY
Data sources: Datacite
ZENODO
Research . 2026
License: CC BY
Data sources: Datacite
ZENODO
Research . 2026
License: CC BY
Data sources: Datacite
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The Polar Shell Renderer: Equal-Area Denominator Shells for Reduced Fractions and Primitive Roots of Unity

Authors: Huckstead, Jeffery;

The Polar Shell Renderer: Equal-Area Denominator Shells for Reduced Fractions and Primitive Roots of Unity

Abstract

We describe a polar rendering of the reduced fractions. Each reduced fraction $k/n$ with $\gcd(k,n)=1$ is placed at radius $\sqrt{n}$ and angle $2\pi k/n$. Under this map four classical structures become visible together in a single figure: each concentric shell at radius $\sqrt{n}$ carries exactly $\varphi(n)$ points (Euler's totient); the angular positions on that shell are exactly the primitive $n$-th roots of unity (the roots of the $n$-th cyclotomic polynomial); the $\sqrt{n}$ radial law makes every denominator shell an equal-area annulus; and the cumulative point count out to denominator $N$ is the summatory totient $\Phi(N)$, whose leading asymptotic $3N^2/\pi^2$ is the classical Mertens result (with Walfisz's later refinement of the error term) and whose value $1+\Phi(N)$ is the length of the Farey sequence of order $N$. Because shell $n$ carries $\varphi(n)$ points rather than one, the rendering is not a constant-density filling of the disk; the equal-area claim is instead denominator-local, so each assigned annulus has area $\pi$ and its annularly normalized population is $\varphi(n)/\pi$. All four facts are classical; the contribution is the specific unified representation and the equal-area-by-denominator choice that ties the number-theoretic content to the phyllotaxis (sunflower) tradition. We position the rendering among existing fraction- and root-visualizations --- Ford circles, Farey-sunburst constructions, Vogel's sunflower, roots-of-unity diagrams, and the Ulam--Sacks prime spirals --- and within the author's Triangular-Fractional Grid series, giving the exact denominator-collapse map that realizes the rendering as the reduced skeleton of that grid. No prior instance of the specific unified rendering was found, but the absence of a found instance is not a proof of novelty, and no arithmetical claim is made beyond the classical facts recalled.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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