Product structure of graphs excluding a topological minor

Abstract: We prove that, for all positive integers $h$ and $t$ and every graph $X$ with $\mathrm{td}(X) \leq h$, there exists a positive integer $c(X,t)$ such that every graph $G$ with $\mathrm{tw}(G) &lt; t$ that excludes $X$ as a topological minor is isomorphic to a subgraph of $H \boxtimes K_{c(X,t)}$ for some graph $H$ with $\mathrm{tw}(H) &lt; 2<sup>{h+1}-1$. This extends a result by Ding and Oporowski (Journal of Graph Theory; 1995), which states that for all positive integers $Δ$ and $t$, here exists a positive integer $f(Δ,t)$ such that every graph $G$ with $\mathrm{tw}(G)&lt;t$ and $Δ(G)\leqΔ$ is isomorphic to a subgraph of $T \boxtimes K_{f(Δ,t)}$ for some tree $T$.