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math.CO2012
Relations Between Graphs
Jan Hubicka, Jürgen Jost, Yangjing Long +2
Given two graphs G and H, we ask under which conditions there is a relation R that generates the edges of H given the structure of graph G. This construction can be seen as a form…
math.CO2012
Homomorphism-homogeneous L-colored graphs
David Hartman, Jan Hubicka, Dragan Masulovic
A relational structure is homomorphism-homogeneous (HH-homogeneous for short) if every homomorphism between finite induced substructures of the structure can be extended to a homom…