The Minimal Automorphism-Free Tree

Ilhee Kim, Ringi Kim, Paul Seymour

A finite tree $T$ with $|V(T)|\ge 2$ is called {\it automorphism-free} if there is no non-trivial automorphism of $T$. Let $\mathcal{A}\mathcal{F}\mathcal{T}$ be the poset with the element set of al…