We derive the fine-structure constant α−¹ = 137. 036 from geometric consistency requirements of a Finsler–Randers substrate. The key result is a Spinor Transport Closure Theorem: a spacetime supporting globally consistent spin-1/2 transport must satisfy the structural identity κnbare = 1, where nbare is the density of minimal transport loops and κ is the normalized Randers flag curvature. The integer nbare = 24 is derived from the dimensionality, orientation structure, and transverse curvature modes of spin transport in four dimensions. A topological instanton associated with gradient relaxation then fixes the electromagnetic coupling, yielding α = 2C/e^π²/2, where C = 1. 014667 is a one-loop determinant computed using the Gel’fand–Yaglom method. No free parameters or fitted constants appear.
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David B Smith
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David B Smith (Wed,) studied this question.
www.synapsesocial.com/papers/69e07e242f7e8953b7cbf281 — DOI: https://doi.org/10.5281/zenodo.19582528