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math.CO2014
Mutations of puzzles and equivariant cohomology of two-step flag varieties
Anders Skovsted Buch
We introduce a mutation algorithm for puzzles that is a three-direction analogue of the classical jeu de taquin algorithm for semistandard tableaux. We apply this algorithm to prov…
math.CO2014★ 6 cited
The puzzle conjecture for the cohomology of two-step flag manifolds
Anders Skovsted Buch, Andrew Kresch, Kevin Purbhoo +1
We prove a conjecture of Knutson asserting that the Schubert structure constants of the cohomology ring of a two-step flag variety are equal to the number of puzzles with specified…