D-E classification of the local extensions of $SU_2$ current algebras
Teoretičeskaâ i matematičeskaâ fizika, Tome 92 (1992) no. 3, pp. 507-521

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A method is developed for constructing single valued rational 4-point functions of primary fields for $su_2$ conformal current algebra satisfying the Knizhnik–Zamolodchikov equation. For integer conformal dimensions $\Delta$ these rational solutions are proven to be in one-to-one correspondence with non-diagonal modular invariant partition functions of the D-even and E-even series of the ADE classification.
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     author = {L. Michel and Ya. S. Stanev and I. T. Todorov},
     title = {D-E classification of the local extensions of $SU_2$ current algebras},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     volume = {92},
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     language = {en},
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L. Michel; Ya. S. Stanev; I. T. Todorov. D-E classification of the local extensions of $SU_2$ current algebras. Teoretičeskaâ i matematičeskaâ fizika, Tome 92 (1992) no. 3, pp. 507-521. http://geodesic.mathdoc.fr/item/TMF_1992_92_3_a12/