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» A Proof of the Two-path Conjecture
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CP
2006
Springer
15 years 3 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»
14 years 12 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»
14 years 11 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
15 years 4 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»
14 years 12 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