Andersen's conjecture on modular and quantum tilting characters
Andersen's conjecture on modular and quantum tilting characters
Let be a semisimple, simply connected algebraic group with root system over an algebraically closed field of characteristic , let be the dominant weights in the interior of the fundamental -alcove, and let denote the relevant set of dominant elements for the -dilated dot action. For a dominant weight , write for the indecomposable modular tilting module and for the corresponding quantum tilting module.
Andersen's conjecture. Suppose Lusztig's conjecture holds for in characteristic . For and dominant , one has
This conjecture predicts equality between modular and quantum tilting characters in the region governed by Lusztig's conjecture, strengthening Andersen's general lower-bound observation. The supplied text does not state whether it has been resolved.
Sources & referencesView supporting material
Primary source
Amit Hazi, “Matrix recursion for positive characteristic diagrammatic Soergel bimodules for affine Weyl groups”, arXiv:1708.07072 (2025).
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