Fusion-rule conjecture for a family of rational lisse vertex algebras

For each positive integer mm, let r=3m1r=3m-1 and let [i][i] for i=0,1,,ri=0,1,\ldots,r denote the irreducible modules of a rational lisse vertex algebra of central charge

c=136(m+1m).c=13-6\left(m+\frac{1}{m}\right).

Fusion-rule conjecture. There exists such a rational lisse vertex algebra whose irreducible modules satisfy

[i][j]ijkmin{i+j,rij}ki+jmod2[k].[i]\boxtimes[j]\cong\bigoplus_{\substack{|i-j|\leq k\leq\min\{i+j,r-i-j\}\\ k\equiv i+j\bmod 2}}[k].

The claim is proposed from explicit low-rank computations of fusion rings for type DnD_n; no proof or disproof is given in the supplied text.

Sources & referencesView supporting material

Primary source

Tomoyuki Arakawa and Jethro van Ekeren, “Rationality and Fusion Rules of Exceptional W-Algebras”, arXiv:1905.11473 (2021).

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