Relative affinization conjecture for the filtered nodal curve
Relative affinization conjecture for the filtered nodal curve
Let be a commutative ring, and let
be the map classifying the filtered nodal curve over . Denote the corresponding filtered nodal curve by , and let be the filtered circle of Moulinos, Robalo, and Toën. Relative affinization conjecture. The relative affinization of is equivalent to the filtered circle:
Consequently, for every affine scheme over , there is an equivalence
This would explain the parallelism between tmf-Hochschild homology and filtered Hochschild homology through the degeneration from the nodal cubic to the cuspidal cubic. The source presents the assertion as a conjectural description.
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Sources & referencesView supporting material
Primary source
Sarah Scherotzke, Nicolò Sibilla and Paolo Tomasini, “Fourier–Mukai equivalences for formal groups and elliptic Hochschild homology”, arXiv:2505.00172 (2025).
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