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math.RT2006
Thin coverings of modules
Yuly Billig, Michael Lau
Thin coverings are a method of constructing graded-simple modules from simple (ungraded) modules. After a general discussion, we classify the thin coverings of (quasifinite) simple…
math.RT2006
Representations of toroidal extended affine Lie algebras
Yuly Billig
We show that the representation theory for the toroidal extended affine Lie algebras is controlled by a vertex operator algebra which is a tensor product of four VOAs: a sub-VOA of…