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Partially supported by NSF grant MCS-8203739
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Kac, V.G., Peterson, D.H. Unitary structure in representations of infinite-dimensional groups and a convexity theorem. Invent Math 76, 1–14 (1984). https://doi.org/10.1007/BF01388487
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DOI: https://doi.org/10.1007/BF01388487