Orbit-by-orbit inequality for genomic tableaux in the orthogonal Grassmannian

Let ω\omega be the permutation governing the switching algorithm, and let OOrb(ω)\mathcal{O}\in\operatorname{Orb}(\omega) be one of its orbits. A genomic tableau is a tableau counted by the relevant type B Littlewood–Richardson rule, and standardization and reverse standardization order refer to the two traversal procedures in the switching algorithm. Orbit-by-orbit conjecture. There are at least O1|\mathcal{O}|-1 genomic tableaux traversed in standardization order and at least O1|\mathcal{O}|-1 traversed in reverse standardization order in the computation of O\mathcal{O} using the switching algorithm. This refines the global inequality by requiring the contribution O1|\mathcal{O}|-1 separately for every orbit; the paper reports computer evidence but does not establish the claim.

Sources & referencesView supporting material

Primary source

Maria Gillespie, Jake Levinson and Kevin Purbhoo, “Schubert curves in the orthogonal Grassmannian”, arXiv:1903.01673 (2019).

Additional references

2 papers in this index state this conjecture (2016–2019). The statement above is taken from the most recent of them; the others are arXiv:1602.02375.

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