The orbit-lattice fixed-point category conjecture

Let gO(Λ)g\in O(\Lambda) be an element whose frame shape equals the type of an orbit lattice N(Z)N(Z), and let Λg=(Λg)\Lambda_g=(\Lambda^g)^\perp. Choose a lift g^\hat g to an automorphism of the lattice vertex operator algebra VΛgV_{\Lambda_g}. Set

W=VΛgg^.W=V_{\Lambda_g}^{\langle\hat g\rangle}.

Let (A,q)(A,q) be the discriminant space of N(Z)N(Z), and let Q(A,q)\mathcal{Q}(A,-q) be its associated modular tensor category with quadratic form q-q. Fixed-point category conjecture. The algebra WW is a vertex operator algebra whose modular tensor category satisfies

T(W)Q(A,q).\mathcal{T}(W)\cong\mathcal{Q}(A,-q).

This claim is used to describe the eleven relevant genera of orbit lattices and their associated fixed-point vertex operator algebras. The source does not specify whether it has been proved.

Sources & referencesView supporting material

Primary source

Gerald Höhn, “On the Genus of the Moonshine Module”, arXiv:1708.05990 (2017).

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