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On the relationship between Monstrous Moonshine and the uniqueness of the Moonshine Module
Authors:Michael P Tuite
Institution:(1) Department of Mathematical Physics, University College, Galway, Ireland;(2) Dublin Institute for Advanced Studies, 10 Burlington Road, Dublin 4, Ireland
Abstract:We consider the relationship between the conjectured uniqueness of the Moonshine Module,MediaObjects/220_2005_BF02099885_f1.jpg, and Monstrous Moonshine, the genus zero property of the modular invariance group for each Monster group Thompson series. We first discuss a family of possibleZ n meromorphic orbifold constructions ofMediaObjects/220_2005_BF02099885_f2.jpg based on automorphisms of the Leech lattice compactified bosonic string. We reproduce the Thompson series for all 51 non-Fricke classes of the Monster groupM together with a new relationship between the centralisers of these classes and 51 corresponding Conway group centralisers (generalising a well-known relationship for 5 such classes). Assuming thatMediaObjects/220_2005_BF02099885_f3.jpg is unique, we consider meromorphic orbifoldings ofMediaObjects/220_2005_BF02099885_f4.jpg and show that Monstrous Moonshine holds if and onlyZ r if the only meromorphic orbifoldings ofMediaObjects/220_2005_BF02099885_f5.jpg areMediaObjects/220_2005_BF02099885_f6.jpg itself or the Leech theory. This constraint on the meromorphic orbifoldings ofMediaObjects/220_2005_BF02099885_f7.jpg therefore relates Monstrous Moonshine to the uniqueness ofMediaObjects/220_2005_BF02099885_f8.jpg in a new way.
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