30 search results - page 1 / 6 » Homomorphisms and Polynomial Invariants of Graphs |
ENDM
2007
13 years 4 months ago
2007
This paper initiates a study of the connection between graph homomorphisms and the Tutte polynomial. This connection enables us to extend the study to other important polynomial i...
CORR
2010
Springer
13 years 5 months ago
2010
Springer
Trigraph list homomorphism problems (also known as list matrix partition problems) have generated recent interest, partly because there are concrete problems that are not known to...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
The universal cover TG of a connected graph G is the unique (possible infinite) tree covering G, i.e., that allows a locally bijective homomorphism from TG to G. Universal covers h...
LICS
2000
IEEE
13 years 9 months ago
2000
IEEE
We prove that several problems concerning congruences on algebras are complete for nondeterministic log-space. These problems are: determining the congruence on a given algebra gen...
CORR
2010
Springer
13 years 3 months ago
2010
Springer
The Dichotomy Conjecture for Constraint Satisfaction Problems has been verified for conservative problems (or, equivalently, for list homomorphism problems) by Andrei Bulatov. An ...