2009
DOI: 10.1016/j.jalgebra.2009.03.034
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W-algebras related to parafermion algebras

Abstract: We study a W -algebra of central charge 2(k − 1)/(k + 2), k = 2, 3, . . . , contained in the commutant of a Heisenberg algebra in a simple affine vertex operator algebra L(k, 0) of type A (1) 1 with level k. We calculate the operator product expansions of the W -algebra. We also calculate some singular vectors in the case k 6 and determine the irreducible modules and Zhu's algebra. Furthermore, the rationality and the C 2 -cofiniteness are verified for such k.The argument heavily depends on singular vectors v … Show more

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Cited by 71 publications
(140 citation statements)
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“…Applying this to the parafermion vertex operator algebras, we show that the C 2 -cofiniteness for general parafermion vertex operator algebra K (g, k) is completely determined by the regularity of K (sl 2 , k). It was shown in [4] that K (sl 2 , k) is rational and C 2 -cofinite for k 6, thus the C 2 -cofiniteness for general parafermion vertex operator algebra K (g, k) of small level k follows.…”
Section: Introductionmentioning
confidence: 95%
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“…Applying this to the parafermion vertex operator algebras, we show that the C 2 -cofiniteness for general parafermion vertex operator algebra K (g, k) is completely determined by the regularity of K (sl 2 , k). It was shown in [4] that K (sl 2 , k) is rational and C 2 -cofinite for k 6, thus the C 2 -cofiniteness for general parafermion vertex operator algebra K (g, k) of small level k follows.…”
Section: Introductionmentioning
confidence: 95%
“…Some aspects of both the structure and representation theory of parafermion vertex operator algebras have been studied in [3][4][5]11]. In particular, a set of generators for general parafermion vertex operator algebra K (g, k) is obtained.…”
Section: Introductionmentioning
confidence: 99%
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“…Although the parafermion field theory has been studied for more than two decades, the mathematical investigation of the parafermion vertex operator algebras have been limited by a lack of understanding of the structural theory of these algebras. The goals of this paper and [4][5][6] are to alleviate this situation.…”
Section: Introductionmentioning
confidence: 99%
“…More importantly, it is widely believed that K (g, k) should give a new class of rational, C 2 -cofinite vertex operator algebras although this can only been proved in the case g = sl 2 and k ≤ 6 [5]. Most well known vertex operator algebras such as lattice vertex operator algebras [2,3,10], the affine vertex operator algebras [7,11,23] and the Virasoro vertex operator algebras [11,25] can be understood well using the underline lattices or Lie algebras.…”
Section: Introductionmentioning
confidence: 99%