Author: Urs Format: MarkdownItexfor completeness and so that it can be referred to from elsewhere, I have added statement of the characterization of epi/monomorphisms of simplicial sets ([here](https://ncatlab.org/nlab/show/SimpSet#EpimorphismsOfSimplicialSetsDetectedDegreewise))
<a href="https://ncatlab.org/nlab/revision/diff/SimpSet/17">diff</a>, <a href="https://ncatlab.org/nlab/revision/SimpSet/17">v17</a>, <a href="https://ncatlab.org/nlab/show/SimpSet">current</a>
for completeness and so that it can be referred to from elsewhere, I have added statement of the characterization of epi/monomorphisms of simplicial sets (here)