%0 Journal Article %A V.G. Kac %A D.H. Peterson %T Unitary structure in representations of infinite-dimensional groups and a convexity theorem. %J Inventiones mathematicae %D 1984 %P 1-14 %V 76 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1984__76_143112/ %F IM_1984__76_143112