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AUTOMATICA
2007
113views more  AUTOMATICA 2007»
15 years 7 months ago
Active mode observability of switching linear systems
In this paper active mode observability is addressed for a class of discrete-time linear systems that may switch in an unknown and unpredictable way among different modes taken f...
Marco Baglietto, Giorgio Battistelli, Luca Scardov...
COR
2008
105views more  COR 2008»
15 years 7 months ago
Minimizing the object dimensions in circle and sphere packing problems
Given a fixed set of identical or different-sized circular items, the problem we deal with consists on finding the smallest object within which the items can be packed. Circular, ...
Ernesto G. Birgin, F. N. C. Sobral
4OR
2006
100views more  4OR 2006»
15 years 7 months ago
Nondecomposable solutions to group equations and an application to polyhedral combinatorics
This paper is based on the study of the set of nondecomposable integer solutions in a Gomory corner polyhedron, which was recently used in a reformulation method for integer linear...
Matthias Jach, Matthias Köppe, Robert Weisman...
AML
2006
106views more  AML 2006»
15 years 6 months ago
Upper bounds on complexity of Frege proofs with limited use of certain schemata
The paper considers a commonly used axiomatization of the classical propositional logic and studies how different axiom schemata in this system contribute to proof complexity of th...
Pavel Naumov
APAL
2006
79views more  APAL 2006»
15 years 6 months ago
Cardinal invariants related to permutation groups
We consider the possible cardinalities of the following three cardinal invariants which are related to the permutation group on the set of natural numbers: ag := the least cardina...
Bart Kastermans, Yi Zhang 0008