Example 3.1.4.13. Let $X$ be a simplicial set. Then the unique morphism $f: X \rightarrow \Delta ^{0}$ is a covering map of simplicial sets if and only if $X$ is discrete (see Definition 1.1.5.10).
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Example 3.1.4.13. Let $X$ be a simplicial set. Then the unique morphism $f: X \rightarrow \Delta ^{0}$ is a covering map of simplicial sets if and only if $X$ is discrete (see Definition 1.1.5.10).