The Interpretation Lifting Theorem for C-Systems

Abstract

In this article we present a solution to a conjecture of Vladimir Voevodsky regarding C-systems. This conjecture provides, under some assumptions, a lift of a functor $M\colon \mathrm{CC} \rightarrow \mathcal{C}$, where $\mathrm{CC}$ is a C-system and $\mathcal{C}$ a category, to a morphism of C-systems $M'\colon \mathrm{CC} \rightarrow \mathrm{CC}(\widehat{\mathcal{C}},p_M)$. We explain the motivation behind this conjecture and introduce the required background material on C-systems. Finally, we give a proof of this conjecture.