Crosshatch-pair conjecture for equivalence classes of Kazhdan–Lusztig pairs

From papers

Given a composition α=(α1,α2,,αk)n\alpha=(\alpha_1,\alpha_2,\ldots,\alpha_k)\models n, define the permutation

xα=[nα1,nα1+1,,n1,nα1α2,nα1α2+1,,nα11,,0,1,,αk1].x_\alpha=[n-\alpha_1,n-\alpha_1+1,\ldots,n-1,n-\alpha_1-\alpha_2,n-\alpha_1-\alpha_2+1,\ldots,n-\alpha_1-1,\ldots,0,1,\ldots,\alpha_k-1].

Let Xn={xα:αn}X_n=\{x_\alpha:\alpha\models n\}. A crosshatch pair is a pair xwx\leq w such that xw0,wXnxw_0,w\in X_n. The relation \sim is the equivalence relation on pairs induced by the L-S operators. Crosshatch-pair conjecture. Every \sim-equivalence class contains a crosshatch pair. The conjecture concerns representatives of equivalence classes and would give a structured representative for each class; the surrounding computations suggest further coalescence as the parameter kk increases, but no resolution of this conjecture is given.

Progress summary

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Sources & referencesView supporting material

Primary source

Gregory S. Warrington, “Equivalence classes for the mu-coefficient of Kazhdan-Lusztig polynomials in S_n”, arXiv:1010.3961 (2010).

Solutions 0

No solutions have been posted yet.