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» On Odd and Even Cycles in Normal Logic Programs
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AAAI
2004
13 years 6 months ago
On Odd and Even Cycles in Normal Logic Programs
An odd cycle of a logic program is a simple cycle that has an odd number of negative edges in the dependency graph of the program. Similarly, an even cycle is one that has an even...
Fangzhen Lin, Xishun Zhao
CORR
2004
Springer
124views Education» more  CORR 2004»
13 years 4 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
EPIA
2005
Springer
13 years 10 months ago
Revised Stable Models - A Semantics for Logic Programs
This paper introduces an original 2-valued semantics for Normal Logic Programs (NLP), which conservatively extends the Stable Model semantics (SM) to all normal programs. The dist...
Luís Moniz Pereira, Alexandre Miguel Pinto
ECAI
2006
Springer
13 years 8 months ago
On the Existence of Answer Sets in Normal Extended Logic Programs
An often problematic feature in answer set programming is that a program does not always produce an answer set, even for programs which represent default information in a seemingl...
Martin Caminada, Chiaki Sakama
ASP
2005
Springer
13 years 10 months ago
A New Algorithm for Answer Set Computation
A new exact algorithm for computing answer sets of logic programs is presented and analyzed. The algorithm takes a logic program in Kernel normal form as an input and computes its ...
Giuliano Grossi, Massimo Marchi