Golden Ratio, Penrose Tilings, and Clifford Theory: A Unified Link — E8 Intelligence Research
Year: 2026
Type: preprint
Abstract: FINDING: The search results converge on the deep structural link between the golden ratio's continued fraction, forbidden 5-fold symmetry in quasicrystals (Penrose tilings), and representation theory via Clifford theory for subgroup chains. | MATH: Golden ratio φ = (1+√5)/2 = 1.618...; continued fraction φ = [1;1,1,1,...] = 1 + 1/(1+1/(1+...)); convergents are ratios of consecutive Fibonacci numbers F_{n+1}/F_n → φ. Penrose tiling: 5-fold rotational symmetry (impossible in periodic crystals) achieved via aperiodic tiling with two rhombi (angles 36°/72° and 72°/108°), whose area ratio is φ. Clifford theory: for chain 1 ◁ G_1 ◁ ... ◁ G_d = G, decomposes simple G-modules into fragments over normal subgroups; the "glider" representation generalizes this, linking subgroup lattice structure to module decomposition. | CONNECTION: The golden ratio's continued fraction [1;1,1,...] is the *slowest* converging continued fraction — this is precisely why 5-fold symmetry cannot be periodic (requires Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com
Author: Caldin, Andrew Stewart
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7210279573
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