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Explicit Decomposition Theorem for special Schubert varieties
Published 21 Sep 2018 in math.AG and math.RT | (1809.08012v2)
Abstract: We give a short and self-contained proof of the Decomposition Theorem for the non-small resolution of a Special Schubert variety. We also provide an explicit description of the perverse cohomology sheaves. As a by-product of our approach, we obtain a simple proof of the Relative Hard Lefschetz Theorem.
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