The component formula for intertwining-operator poles
The component formula for intertwining-operator poles
Let , and let and be the corresponding irreducible representations. For irreducible representations , let be the order of the pole at of the meromorphically continued intertwining operator . Let be the sum of the two pole orders and the order of the zero at of the corresponding composition. Write and for the generic Hom and first Ext dimensions attached to the components.
Intertwining-pole conjecture. One has
This is the paper's main geometric conjecture: it predicts that pole orders of intertwining operators are controlled by Hom and Ext data of Lusztig's characteristic variety. The supplied text does not state a resolution.
Sources & referencesView supporting material
Primary source
Johannes Droschl, “Poles of intertwining operators in terms of irreducible components of Lusztig's characteristic variety in type A”, arXiv:2508.13817 (2025).
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