COMBINATORICA
2004
14 years 14 days ago
2004
We extend the basic theory concerning the cycle space of a finite graph to infinite locally finite graphs, using as infinite cycles the homeomorphic images of the unit circle in t...
CORR
2006
Springer
14 years 19 days ago
2006
Springer
We show that it is equivalent, for certain sets of finite graphs, to be definable in CMS (counting monadic second-order, a natural extension of monoadic second-order logic), and t...
DLT
2004
14 years 2 months ago
2004
New results on the recognizability of sets of finite graphs, hypergraphs and relational structures are presented. The general framework of this research which associates tightly a...
CIE
2008
Springer
14 years 2 months ago
2008
Springer
A computable graph is computably categorical if any two computable presentations of the graph are computably isomorphic. In this paper we investigate the class of computably catego...