The noncommutative cohomology conjecture for dg-categories
The noncommutative cohomology conjecture for dg-categories
Let be a candidate (co)homology theory on dg-categories over , with the category of dg-categories over and the category of spectra. For a Morita equivalence , require that be a stable equivalence, and let denote algebraic -theory. If is a sufficiently nice -scheme and is prime, write for its dg-category of perfect complexes, for a Frobenius transformation, and for homotopy fixed points. The noncommutative cohomology conjecture. There exists a (co)homology theory satisfying Morita invariance, being a localizing invariant, admitting a natural transformation , giving a natural cochain-complex structure, and such that for every such and its completed hypercohomology recovers -adic cohomology, it admits Frobenius and recovers the Lefschetz–Grothendieck -adic trace formula, and the induced trace map satisfies
for . The conjecture proposes a noncommutative analogue of -adic cohomology and the Quillen–Lichtenbaum approximation, with the trace map providing the connective approximation after -completion.
Sources & referencesView supporting material
Primary source
Ilias Amrani, “Analogy between the cyclotomic trace map K TC and the Grothendieck trace formula via noncommutative geometry”, arXiv:1503.00317 (2015).
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