Abstract

Maximal ungauged supergravities in ten or fewer dimensions can be viewed as field-theory limits of toroidally compactified type-II superstrings. The symmetries of the spectra can then be constructed in terms of vertex operators, and it is shown here how this can be done to obtain the global and composite local symmetries previously discovered in supergravity lagrangians. This formulation reveals the common origin of the symmetries in different dimensions and indicates possible extensions to Kac-Moody symmetries.

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