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arXiv · 2610.41891

Finite Composites of the Fibonacci Category with Pointed Fusion Categories

Huixuan He·Zhengwei Liu
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Abstract

We classify finite composites of the positive Fibonacci category with arbitrary pointed fusion categories, retaining the entire source functor and making no unitarity assumption on the target. Formal codegrees, dimension fields, and algebraic integrality exclude all dihedral Fibonacci rings $R_n$ with $n\ge4$ from categorification. Together with an independent graphical uniqueness argument, this gives the finite two-Fibonacci classification. For several marked Fibonacci generators, a geometric height-and-polygon argument identifies the based ring with a standard-basis Coxeter--Hecke ring. Transitive conjugation by the pointed image forces the noncommutation graph to be empty or a perfect matching. We then obtain a crossed-product classification in terms of a quotient group, a stabilizer, labelled Fibonacci or rank-six $\TT$ blocks, and compatible cocycle and categorical action data. This includes the Fibonacci--$\Z/3\Z$ composite problem without target unitarity. We also establish the corresponding forms and marked descent statements over characteristic-zero fields admitting the chosen Fibonacci-type input.

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BibTeXRIS

Huixuan He, Zhengwei Liu. 2026-10-30. Finite Composites of the Fibonacci Category with Pointed Fusion Categories. https://arxiv.org/abs/2610.41891

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