For an arbitrary finite hypergraph $\mathcal{H}$ put each edge in a separate component, that is, take $\mathcal{A}_i = \\{A_i\\}$. All such one-hyperedge graphs have all degrees equal to one, so they are acyclic.
I hope this helps $\ddot\smile$
For an arbitrary finite hypergraph $\mathcal{H}$ put each edge in a separate component, that is, take $\mathcal{A}_i = \\{A_i\\}$. All such one-hyperedge graphs have all degrees equal to one, so they are acyclic.
I hope this helps $\ddot\smile$