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20022026
most citedGalactic Center gamma-ray "excess" from an active past of the Galactic Centre?

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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…