Comparison conjecture for arithmetic D\mathcal{D}-module and rigid cohomology

Let XηX_\eta be the generic fibre of the strictly semi-stable scheme considered in the paper, let EK\mathcal{E}^{\dagger}_K be the bounded Robba-ring coefficient field, and write RΓD\mathbb{R}\Gamma_{\mathcal{D}} and RΓrig\mathbb{R}\Gamma_{\mathrm{rig}} for arithmetic D\mathcal{D}-module and rigid cohomology. Comparison conjecture. There should be a canonical isomorphism

RΓD(Xη/EK)RΓrig(Xη/EK)\mathbb{R}\Gamma_{\mathcal{D}}(X_\eta/\mathcal{E}^{\dagger}_K)\simeq\mathbb{R}\Gamma_{\mathrm{rig}}(X_\eta/\mathcal{E}^{\dagger}_K)

such that the induced isomorphism

HDi(Xη/EK)Hrigi(Xη/EK)H^i_{\mathcal{D}}(X_\eta/\mathcal{E}^{\dagger}_K)\simeq H^i_{\mathrm{rig}}(X_\eta/\mathcal{E}^{\dagger}_K)

is compatible with the structures of \nabla-modules and with pullbacks. This is motivated by the comparison theorem cited in the paper and by Lazda–Pál's rigid cohomology over bounded Robba rings; the source presents it as expected rather than established.

Sources & referencesView supporting material

Primary source

Yuanmin Liu, “p-Adic Weight Spectral Sequences of Strictly Semi-stable Schemes over Formal Power Series Rings via Arithmetic D-modules”, arXiv:2502.12136 (2026).

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