Let G (V, E) be a directed acyclic graph in which there is a vertex 0 V such that there exists a unique path from 0 to every vertex V Prove that the undirected version of G forms a tree

Question: Let G = (V, E) be a directed acyclic graph in which there is a vertex 0 V such that there exists a

Let G = (V, E) be a directed acyclic graph in which there is a vertex ν₀ ∈ V such that there exists a unique path from ν₀ to every vertex ν ∈ V. Prove that the undirected version of G forms a tree.

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