Character identification for the admissible affine VOA V3/2(G2)V_{-3/2}(G_2)

Let V=V3/2(G2)V=V_{-3/2}(G_2) be the affine vertex operator algebra at admissible level 3/2-3/2, and let f0f_0 and 7f4/57f_{4/5} be the solutions of the fourth-order modular linear differential equation (48/5)(\flat_{-48/5}) defined in the paper. The ordinary irreducible VV-modules have conformal weights 00 and 4/54/5. Character identification conjecture. The characters of the irreducible ordinary modules over V3/2(G2)V_{-3/2}(G_2) coincide with the solutions f0f_0 and 7f4/57f_{4/5} of (48/5)(\flat_{-48/5}). If true, f0f_0 gives a character formula for V3/2(G2)V_{-3/2}(G_2) in terms of modular forms. The conjecture concerns an admissible affine VOA that is not C2C_2-cofinite but is semisimple in the category O\mathcal{O}; its status is not resolved in the supplied text.

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Primary source

Kazuya Kawasetsu and Yuichi Sakai, “Modular linear differential equations of fourth order and minimal W-algebras”, arXiv:1803.02022 (2018).

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