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ECCC
2010
89views more  ECCC 2010»
15 years 6 months ago
Lower bounds for designs in symmetric spaces
A design is a finite set of points in a space on which every "simple" functions averages to its global mean. Illustrative examples of simple functions are low-degree pol...
Noa Eidelstein, Alex Samorodnitsky
DISOPT
2008
81views more  DISOPT 2008»
15 years 6 months ago
Intermediate integer programming representations using value disjunctions
We introduce a general technique to create an extended formulation of a mixed-integer program. We classify the integer variables into blocks, each of which generates a finite set ...
Matthias Köppe, Quentin Louveaux, Robert Weis...
EJC
2008
15 years 6 months ago
On digraph coloring problems and treewidth duality
It is known that every constraint-satisfaction problem (CSP) reduces, and is in fact polynomially equivalent, to a digraph coloring problem. By carefully analyzing the constructio...
Albert Atserias
ENTCS
2008
99views more  ENTCS 2008»
15 years 6 months ago
SPPF-Style Parsing From Earley Recognisers
In its recogniser form, Earley's algorithm for testing whether a string can be derived from a grammar is worst case cubic on general context free grammars (CFG). Earley gave ...
Elizabeth Scott
ENTCS
2008
115views more  ENTCS 2008»
15 years 6 months ago
Time Separation of Events: An Inverse Method
The problem of "time separation" can be stated as follows: Given a system made of several connected components, each one entailing a local delay known with uncertainty, ...
Emmanuelle Encrenaz, Laurent Fribourg