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» A Proof of the Two-path Conjecture
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CP
2006
Springer
13 years 11 months ago
Constraint Programming Models for Graceful Graphs
The problem of finding a graceful labelling of a graph, or proving that the graph is not graceful, has previously been modelled as a CSP. A new and much faster CSP model of the pro...
Barbara M. Smith
ENDM
2010
84views more  ENDM 2010»
13 years 7 months ago
Formulation symmetries in circle packing
The performance of Branch-and-Bound algorithms is severely impaired by the presence of symmetric optima in a given problem. We describe a method for the automatic detection of for...
Alberto Costa, Leo Liberti, Pierre Hansen
JGT
2007
69views more  JGT 2007»
13 years 7 months ago
The size of minimum 3-trees
A 3-uniform hypergraph is called a minimum 3-tree, if for any 3-coloring of its vertex set there is a heterochromatic triple and the hypergraph has the minimum possible number of ...
Jorge L. Arocha, Joaquín Tey
FOCS
1999
IEEE
13 years 11 months ago
A Study of Proof Search Algorithms for Resolution and Polynomial Calculus
This paper is concerned with the complexity of proofs and of searching for proofs in two propositional proof systems: Resolution and Polynomial Calculus (PC). For the former syste...
Maria Luisa Bonet, Nicola Galesi
APAL
2010
98views more  APAL 2010»
13 years 7 months ago
Classical proof forestry
Classical proof forests are a proof formalism for first-order classical logic based on Herbrand's Theorem and backtracking games in the style of Coquand. First described by M...
Willem Heijltjes