Delta Characters and Filtered Isocrystals

Lance Gurney, Sudip Pandit, Arnab Saha

Given an abelian scheme $A$ over a $p$-adic ring $R$, Borger and Saha constructed a filtered module $\{{\mathbf{H}}_{\delta }(A)\supset {\mathbf{X}}_{\mathrm{prim}}(A)\supset \{0\}\}$ with a…