Schubert varieties and the fusion products

Boris Feigin, Evgeny Feigin

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


For each A ∈ ℕn we define a Schubert variety sh A as a closure of the SL2(ℂ[t])-orbit in the projectivization of the fusion product MA. We clarify the connection of the geometry of the Schubert varieties with an algebraic structure of M A as sl2 ⊗ ℂ[t] modules. In the case, when all the entries of A are different, shA is smooth projective complex algebraic variety. We study its geometric properties: the Lie algebra of the vector fields, the coordinate ring, the cohomologies of the line bundles. We also prove that the fusion products can be realized as the dual spaces of the sections of these bundles.

Original languageEnglish
Pages (from-to)625-668
Number of pages44
JournalPublications of the Research Institute for Mathematical Sciences
Issue number3
Publication statusPublished - Sep 2004
Externally publishedYes


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