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A diagrammatic equation for oriented planar graphs

✍ Scribed by Razvan Gurau


Book ID
116798055
Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
288 KB
Volume
839
Category
Article
ISSN
0550-3213

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The oriented chromatic number o(H) of an oriented graph H is defined to be the minimum order of an oriented graph H' such that H has a homomorphism to H'. If each graph in a class ~ has a homomorphism to the same H', then H' is ~-universal. Let ~k denote the class of orientations of planar graphs wi