70 search results - page 8 / 14 » The complexity of counting graph homomorphisms |
DCG
2011
13 years 2 months ago
2011
We study the expected topological properties of ˇCech and Vietoris-Rips complexes built on random points in Rd . We find higher dimensional analogues of known results for connect...
CSR
2008
Springer
13 years 7 months ago
2008
Springer
Constraint satisfaction problems have enjoyed much attention since the early seventies, and in the last decade have become also a focus of attention amongst theoreticians. Graph c...
FOCS
2007
IEEE
14 years 1 months ago
2007
IEEE
: It is well-known that constraint satisfaction problems (CSP) over an unbounded domain can be solved in time nO(k) if the treewidth of the primal graph of the instance is at most ...
FSTTCS
2009
Springer
14 years 2 months ago
2009
Springer
ABSTRACT. We consider concurrent systems that can be modelled as 1-safe Petri nets communicating through a fixed set of buffers (modelled as unbounded places). We identify a param...
SODA
2004
ACM
13 years 8 months ago
2004
ACM
Graph H is a root of graph G if there exists a positive integer k such that x and y are adjacent in G if and only if their distance in H is at most k. Motwani and Sudan [1994] prov...