70 search results - page 2 / 14 » The complexity of counting graph homomorphisms |
STACS
2010
Springer
15 years 1 months ago
2010
Springer
We completely characterise the computational complexity of the list homomorphism problem for graphs in combinatorial and algebraic terms: for every graph H the problem is either N...
ICALP
2010
Springer
15 years 2 months ago
2010
Springer
PVLDB
2010
14 years 7 months ago
2010
In a variety of emerging applications one needs to decide whether a graph G matches another Gp, i.e., whether G has a topological structure similar to that of Gp. The traditional ...
DAM
2008
14 years 9 months ago
2008
By use of elementary geometric arguments we prove the existence of a special integral solution of a certain system of linear equations. The existence of such a solution yields the...
AAIM
2008
Springer
15 years 3 months ago
2008
Springer
For digraphs D and H, a mapping f : V (D)→V (H) is a homomorphism of D to H if uv ∈ A(D) implies f(u)f(v) ∈ A(H). If, moreover, each vertex u ∈ V (D) is associated with co...