Chapter: Digraphs

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  1. Definition: Digraph, Initial and Terminal Vertices, Loops, Parallel and Inverse Edges, Simple Digraph
  2. Definition: Incidence, Adjacency, Predecessor and Successor Vertices, Neighbours
  3. Definition: Subdigraphs and Superdigraphs; Induced Subdigraph
  4. Definition: Vertex Degrees for Digraphs
  5. Lemma: Handshaking Lemma for Finite Digraphs

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