Variations on a Theme: Graph Homomorphisms
This thesis investigates three areas of the theory of graph homomorphisms: cores of graphs, the homomorphism order, and quantum homomorphisms. A core of a graph X is a vertex minimal subgraph to which X admits a homomorphism. Hahn and Tardif have shown that, for vertex transitive graphs, the size o...
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| Language: | en |
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2013
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| Online Access: | http://hdl.handle.net/10012/7814 |