Gradedness of the set of rook placements in An−1
A rook placement is a subset of a root system consisting of positive roots with pairwise non-positive inner products. To each rook placement in a root system one can assign the coadjoint orbit of the Borel subgroup of a reductive algebraic group with this root system. Degenerations of such orbits in...
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| Format: | Article |
| Language: | English |
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Sciendo
2021-06-01
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| Series: | Communications in Mathematics |
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| Online Access: | https://doi.org/10.2478/cm-2021-0016 |