Grothendieck–Plancherel conjecture for the homogeneous limit shape

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Let x,y↘0x,y\searrow 0 and let β=β(x)↗0\beta=\beta(x)\nearrow 0 satisfy −β(x)≪x-\beta(x)\ll x. Let W(u∣x,y,β(x))\mathfrak{W}(u\mid x,y,\beta(x)) denote the Grothendieck limit shape, and let Ω(u)\Omega(u) be the Vershik–Kerov–Logan–Shepp shape. Grothendieck–Plancherel conjecture. The rescaled limit shape

1xyW(uxy∣x,y,β(x))\frac{1}{\sqrt{xy}}\mathfrak{W}(u\sqrt{xy}\mid x,y,\beta(x))

converges to Ω(u)\Omega(u). This is motivated by the fact that the bounding Schur-process limit shapes become close to the Plancherel limit shape in this regime; the conjecture is supported by numerical experiments, but no resolution is given here.

References

Primary source

Svetlana Gavrilova and Leonid Petrov, “Tilted biorthogonal ensembles, Grothendieck random partitions, and determinantal tests”, arXiv:2305.17747 (2024).

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