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LFCS
2009
Springer
14 years 3 months ago
A Clausal Approach to Proof Analysis in Second-Order Logic
This work defines an extension CERES2 of the first-order cut-elimination method CERES to the subclass of sequent calculus proofs in second-order logic using quantifier-free comp...
Stefan Hetzl, Alexander Leitsch, Daniel Weller, Br...
IANDC
2007
66views more  IANDC 2007»
13 years 9 months ago
Quantitative temporal logics over the reals: PSpace and below
In many cases, the addition of metric operators to qualitative temporal logics (TLs) increases the complexity of satisfiability by at least one exponential: while common qualitat...
Carsten Lutz, Dirk Walther, Frank Wolter
PODS
2000
ACM
102views Database» more  PODS 2000»
14 years 1 months ago
Linear Approximation of Planar Spatial Databases Using Transitive-Closure Logic
We consider spatial databases in the plane that can be defined by polynomial constraint formulas. Motivated by applications in geographic information systems, we investigate line...
Floris Geerts, Bart Kuijpers
JAR
2007
129views more  JAR 2007»
13 years 9 months ago
A Tableau Algorithm for Description Logics with Concrete Domains and General TBoxes
To use description logics (DLs) in an application, it is crucial to identify a DL that is sufficiently expressive to represent the relevant notions of the application domain, but f...
Carsten Lutz, Maja Milicic
FROCOS
2007
Springer
14 years 3 months ago
Noetherianity and Combination Problems
In abstract algebra, a structure is said to be Noetherian if it does not admit infinite strictly ascending chains of congruences. In this paper, we adapt this notion to first-ord...
Silvio Ghilardi, Enrica Nicolini, Silvio Ranise, D...