The change-of-basis coefficients between the dual canonical and MV bases
The change-of-basis coefficients between the dual canonical and MV bases
Let be a finite-dimensional simple module over the relevant KLR algebra, let be the corresponding vector in the dual canonical basis of , and let be the MV-basis vector corresponding to an MV cycle . For each and , let be the non-negative integer defined by the multiplicity of in the scheme-theoretic support of the associated graded module constructed from . Change-of-basis conjecture. The change of basis from the dual canonical basis to the MV basis is given by the non-negative integers ; equivalently, the expansion of each in the MV basis has coefficients . The preceding theorem establishes the corresponding equality after applying the bar-character map, providing evidence for this conjecture; its general validity is left open.
Sources & referencesView supporting material
Primary source
Alexis Leroux-Lapierre, “Category O and asymptotic characters”, arXiv:2507.16215 (2025).
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