The trichotomy conjecture for the cohomology of simple modules under the linearisation map
Let be an NCCR of the ring satisfying Assumption~, and suppose for some . Set for . For each vertex , consider the image under the linearisation map and its cohomology sheaves.
Trichotomy conjecture. For every vertex , there is a unique such that
Moreover, if and only if the locus
is a supporting hyperplane of .
This conjecture predicts that the nonzero cohomology of each occurs in exactly one of two adjacent degrees, with the degree determined by whether the corresponding coordinate locus supports the chamber . The supplied text does not state a resolution or provide evidence establishing the conjecture, so its status remains open.
References
Primary source
Alastair Craw, “Gale duality and the linearisation map for noncommutative crepant resolutions”, arXiv:2109.09565 (2021).
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