Garsia–Procesi modules are weakly quasisymmetric characteristic compatible

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Let \falR\fmu\falR_{\fmu} denote the Garsia–Procesi module associated with a partition \fmu\fmu, and let \fY=xα∣α is sub-Yamanouchi\fY={x^{\alpha}\mid \alpha\text{ is sub-Yamanouchi}} be its specified monomial basis, ordered by \fler\fle_r. A triple (M,\fB,\fle)(M,\fB,\fle) is called weakly quasisymmetric characteristic compatible (WQCC) when the weak Hecke deformation \foverlineπi\foverline{\pi}_i of the \fSn\fS_n-action defines an \fHn(0)\fH_n(0)-module \fwidehatM\fwidehat M satisfying FcharQ(\fwidehatM)=Fchar(M)F_{char}^Q(\fwidehat M)=F_{char}(M). Garsia–Procesi WQCC conjecture. If \fY=\{x^{\alpha}\mid \alpha\text{ is sub-Yamanouchi}}, then (\fR\fmu,\fY,\fler)(\fR_{\fmu},\fY,\fle_r) is WQCC. Extensive computer simulation suggests this additional WQCC example beyond the proved coinvariant example, but no proof or resolution is given here.

References

Primary source

Angela Hicks and Samantha Miller-Brown, “Three Examples of Quasisymmetric Compatible S_n-modules”, arXiv:2403.16249 (2024).

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