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VL
1993
IEEE
159views Visual Languages» more  VL 1993»
14 years 3 months ago
A Visual Logic Programming Language Based on Sets and Partitioning Constraints
This paper presents a new programming language named SPARCL that has four major elements: it is a visual language, it is a logic programming language, it relies on sets to organiz...
Lindsey L. Spratt, Allen L. Ambler
STACS
1993
Springer
14 years 3 months ago
The Complexity of Logic-Based Abduction
Abduction is an important form of nonmonotonic reasoning allowing one to find explanations for certain symptoms or manifestations. When the application domain is described by a l...
Thomas Eiter, Georg Gottlob
CORR
2004
Springer
124views Education» more  CORR 2004»
13 years 11 months ago
On the existence of stable models of non-stratified logic programs
In this paper we analyze the relationship between cyclic definitions and consistency in GelfondLifschitz's answer sets semantics (initially defined as `stable model semantics...
Stefania Costantini
LICS
2002
IEEE
14 years 4 months ago
Tree Extension Algebras: Logics, Automata, and Query Languages
We study relations on trees defined by first-order constraints over a vocabulary that includes the tree extension relation Ì Ì ¼, holding if and only if every branch of Ì ex...
Michael Benedikt, Leonid Libkin
AMAI
2000
Springer
13 years 11 months ago
The logic of events
An event space is a set of instantaneous events that vary both in time and specificity. The concept of an event space provides a foundation for a logical--i.e., modular and open-a...
Glenn Shafer, Peter R. Gillett, Richard B. Scherl