The algebraic cohomology exactness conjecture for resolutions
The algebraic cohomology exactness conjecture for resolutions
Let be a singular projective variety, let be any resolution of singularities, and let be the exceptional divisor. Let be an integer such that
The cohomology sequence
is exact. The algebraic cohomology exactness conjecture. Taking algebraic cohomology groups preserves this exactness; namely,
is exact. This conjecture asks whether exactness survives after restricting to algebraic cohomology classes; the source does not specify whether it has been resolved.
Sources & referencesView supporting material
Primary source
Ananyo Dan and Inder Kaur, “Mumford Tate groups and the Hodge conjecture”, arXiv:2301.01005 (2023).
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