Overconvergent Eichler-Shimura morphisms for ${\mathrm{GSp}}_4$

Hansheng Diao, Giovanni Rosso, Ju-Feng Wu

We construct explicit Eichler-Shimura morphisms for families of overconvergent Siegel modular forms of genus two. These can be viewed as $p$-adic interpolations of the Eichler-Shim…