Joint seminar: Combinatorics and Algebraic Geometry

Recognizing Schubert Cells

Sergey Fomin


December 4,
refreshments at 3:45pm


How can we determine which Schubert cell a given point on G/B is in from the vanishing pattern of its Plucker coordinates? Different versions of this problem will be discussed, along with the problem of defining a Schubert variety/cell by the minimal number of equations/inequalities of the form "Plucker coordinate vanishes/does not vanish". This is joint work with Andrei Zelevinsky. The paper is available from

Speaker's Contact Info: fomin(at-sign)

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Combinatorics Seminar, Mathematics Department, MIT, sara(at-sign)

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