Rise version of the Extended Delta Conjecture

From papers

Let WPFn;r\mathcal{WPF}_{n;r} denote the set of extended word parking functions with blank valleys having parameters nn and rr. For such an object PF\mathrm{PF}, use the statistics area(PF)\mathrm{area}(\mathrm{PF}), dinv(PF)\mathrm{dinv}(\mathrm{PF}), XPFX^{\mathrm{PF}}, ai(PF)a_i(\mathrm{PF}), and the set Rise(PF)\mathrm{Rise}(\mathrm{PF}) defined in the paper. Let Δek\Delta'_{e_k} and Δhr\Delta_{h_r} be the Delta operators associated with eke_k and hrh_r. Rise version of the Extended Delta Conjecture. For any positive integers nn, kk, and rr with k<nk<n,

ΔekΔhren=PFWPFn;rtarea(PF)qdinv(PF)xPFiRise(PF)(1+ztai(PF))znk1.\Delta'_{e_k}\Delta_{h_r}e_n=\sum_{\mathrm{PF}\in\mathcal{WPF}_{n;r}}t^{\mathrm{area}(\mathrm{PF})}q^{\mathrm{dinv}(\mathrm{PF})}x^{\mathrm{PF}}\prod_{i\in\mathrm{Rise}(\mathrm{PF})}\left(1+\frac{z}{t^{a_i(\mathrm{PF})}}\right)\bigg|_{z^{n-k-1}}.

This is the rise analogue of the Extended Delta Conjecture, whose combinatorial side uses extended word parking functions with blank valleys. The source presents it as a conjecture of Haglund, Remmel and Wilson; no resolution status is supplied in the paper excerpt.

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Sources & referencesView supporting material

Primary source

Dun Qiu and Andrew Timothy Wilson, “The valley version of the Extended Delta Conjecture”, arXiv:1907.00268 (2019).

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