Semi-infinite flags. I. Case of global curve P 1 , Differential topology, infinite-dimensional Lie algebras, and applications
نویسنده
چکیده
1.1. We learnt of the Semiinfinite Flag Space from B.Feigin and E.Frenkel in the late 80-s. Since then we tried to understand this remarkable object. It appears that it was essentially constructed, but under different disguises, by V.Drinfeld and G.Lusztig in the early 80-s. Another recent discovery (BeilinsonDrinfeld Grassmannian) turned out to conceal a new incarnation of Semiinfinite Flags. We write down these and other results scattered in the folklore.
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