8 search results - page 2 / 2 » Posets, homomorphisms and homogeneity |
CSL
2003
Springer
14 years 20 days ago
2003
Springer
For a fixed countable homogeneous relational structure Γ we study the computational problem whether a given finite structure of the same signature homomorphically maps to Γ. T...
JGT
2010
13 years 2 months ago
2010
We answer two open questions posed by Cameron and Nesetril concerning homomorphismhomogeneous graphs. In particular we show, by giving a characterization of these graphs, that ext...
ECRIME
2007
13 years 11 months ago
2007
In the last few years, obfuscation has been used more and more by spammers to make spam emails bypass filters. The standard method is to use images that look like text, since typi...