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» Elimination of Negation in a Logical Framework
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CADE
2003
Springer
14 years 7 months ago
Optimizing Higher-Order Pattern Unification
Abstract. We present an abstract view of existential variables in a dependently typed lambda-calculus based on modal type theory. This allows us to justify optimizations to pattern...
Brigitte Pientka, Frank Pfenning
PPDP
2007
Springer
14 years 1 months ago
Mechanized metatheory model-checking
The problem of mechanically formalizing and proving metatheoretic properties of programming language calculi, type systems, operational semantics, and related formal systems has r...
James Cheney, Alberto Momigliano
LPKR
1997
Springer
13 years 11 months ago
A System for Abductive Learning of Logic Programs
We present the system LAP (Learning Abductive Programs) that is able to learn abductive logic programs from examples and from a background abductive theory. A new type of induction...
Evelina Lamma, Paola Mello, Michela Milano, Fabriz...
IGPL
2010
132views more  IGPL 2010»
13 years 5 months ago
Changing legal systems: legal abrogations and annulments in Defeasible Logic
In this paper we investigate how to represent and reason about legal abrogations and annulments in Defeasible Logic. We examine some options that embed in this setting, and in simi...
Guido Governatori, Antonino Rotolo
NGC
1998
Springer
115views Communications» more  NGC 1998»
13 years 7 months ago
On Semantic Resolution with Lemmaizing and Contraction and a Formal Treatment of Caching
Reducing redundancy in search has been a major concern for automated deduction. Subgoal-reduction strategies, such as those based on model elimination and implemented in Prolog te...
Maria Paola Bonacina, Jieh Hsiang