70 search results - page 7 / 14 » The complexity of counting graph homomorphisms |
COCO
2007
Springer
14 years 1 months ago
2007
Springer
We consider the problem of counting the number of spanning trees in planar graphs. We prove tight bounds on the complexity of the problem, both in general and especially in the mo...
BIRTHDAY
2010
Springer
13 years 8 months ago
2010
Springer
The question of whether there is a logic that captures polynomial time was formulated by Yuri Gurevich in 1988. It is still wide open and regarded as one of the main open problems...
CORR
2010
Springer
13 years 7 months ago
2010
Springer
We discuss the definability of finite graphs in first-order logic with two relation symbols for adjacency and equality of vertices. The logical depth D(G) of a graph G is equal to ...
CONCUR
2011
Springer
12 years 7 months ago
2011
Springer
Abstract. In 2004, Berdine, Calcagno and O’Hearn introduced a fragment of separation logic that allows for reasoning about programs with pointers and linked lists. They showed th...
STOC
2009
ACM
14 years 8 months ago
2009
ACM
d Abstract] Virginia Vassilevska School of Mathematics Institute for Advanced Study Princeton, NJ 08540 USA virgi@math.ias.edu Ryan Williams School of Mathematics Institute for Adv...