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directed graph

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directed graph [də′rek·təd ′graf]
(mathematics)
A graph in which a direction is shown for every arc. Also known as digraph.

directed graph - (digraph) A graph with one-way edges.

See also directed acyclic graph.


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The multistage graph [7] is G (V, E) is a directed graph in which the vertices are partitioned into K 2 disjoint sets Vi, 1 i K.
Some specific topics explored include constructive codes for classical and quantum wiretap channels, fingerprint based encryption, properties of stream ciphers based on extremal directed graphs, and the optimal mean photon number for quantum cryptography.
 
 
 
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