The converse vanishing theorem in Verdier quotients of stable categories
The converse vanishing theorem in Verdier quotients of stable categories
Assume is a complete local complete intersection of dimension and codimension , with algebraically closed residue field . Let be an algebraic set in , let , and let be maximal Cohen–Macaulay -modules. Write . The converse vanishing conjecture. If
then
The paper proves this implication when or is essentially disjoint from , while the conjecture asks for it without that additional assumption. The forward implication is established generally, so the open issue is precisely the converse.
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Primary source
Tony J. Puthenpurakal, “Support Varieties and cohomology of Verdier quotients of stable category of complete intersection rings”, arXiv:2108.00204 (2021).
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