A $\lambda$-adic family of Funke-Millson cycles and a $\lambda$-adic Funke-Millson lift
By Paul Kiefer
Generalizing the construction of the Kudla-Millson geometric theta function, Funke-Millson showed that generating series of cohomology classes of Funke-Millson cycles with values in a local system are modular. We show that these Funke-Millson cycles can be put into a Λ-adic family and show that the corresponding generating series is a Λ-adic family of modular forms. In particular, we obtain a Λ-adic Funke-Millson lift. This is work in progress with Lennart Gehrmann