Affine evacuation weight-vector conjecture

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Let ww be an affine permutation with AMBC data

w⟷AMBC⁡(P,Q,ρ),w \overset{\operatorname{AMBC}}{\longleftrightarrow}(P,Q,\rho),

where PP and QQ are tabloids of shape λ\lambda, and let r(w)r(w) denote the rotation of ww. For a vector, call its dominant representative the representative specified in the cited AMBC conventions. Affine evacuation weight-vector conjecture. There exists a function dd from tabloids of shape λ\lambda to integer vectors of length ℓ(λ)\ell(\lambda) such that, for every ww, ρ(r(w))\rho(r(w)) is the dominant representative of

−ρ(w)+d(Q(w))−d(P(w)).-\rho(w)+d(Q(w))-d(P(w)).

The claim is motivated by the observation that rotation moves entries across the diagonal in a way suggesting ρ′=−ρ\rho'=-\rho, but the existence of the correction function dd and the stated formula remain conjectural.

References

Primary source

M. Chmutov, G. Frieden, D. Kim, J. B. Lewis and E. Yudovina, “An affine generalization of evacuation”, arXiv:1806.07429 (2018).

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