Sciweavers

174 search results - page 27 / 35
» Existential Fixed-Point Logic
Sort
View
DLT
2006
14 years 11 months ago
Well-Founded Semantics for Boolean Grammars
Abstract. Boolean grammars [A. Okhotin, Information and Computation 194 (2004) 19-48] are a promising extension of context-free grammars that supports conjunction and negation. In ...
Vassilis Kountouriotis, Christos Nomikos, Panos Ro...
CORR
2008
Springer
179views Education» more  CORR 2008»
14 years 10 months ago
Induction and Co-induction in Sequent Calculus
Abstract. Proof search has been used to specify a wide range of computation systems. In order to build a framework for reasoning about such specifications, we make use of a sequent...
Alwen Tiu, Alberto Momigliano
TCS
2008
14 years 9 months ago
Verification of qualitative Z constraints
We introduce an LTL-like logic with atomic formulae built over a constraint language interpreting variables in Z. The constraint language includes periodicity constraints, comparis...
Stéphane Demri, Régis Gascon
PODS
2003
ACM
118views Database» more  PODS 2003»
15 years 10 months ago
Numerical document queries
A query against a database behind a site like Napster may search, e.g., for all users who have downloaded more jazz titles than pop music titles. In order to express such queries,...
Helmut Seidl, Thomas Schwentick, Anca Muscholl
SEMWEB
2004
Springer
15 years 3 months ago
Query Answering for OWL-DL with Rules
Both OWL-DL and function-free Horn rules3 are decidable logics with interesting, yet orthogonal expressive power: from the rules perspective, OWL-DL is restricted to tree-like rule...
Boris Motik, Ulrike Sattler, Rudi Studer