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CADE
2002
Springer
16 years 6 months ago
The Reflection Theorem: A Study in Meta-theoretic Reasoning
The reflection theorem has been proved using Isabelle/ZF. This theorem cannot be expressed in ZF, and its proof requires reasoning at the meta-level. There is a particularly elegan...
Lawrence C. Paulson
CADE
2001
Springer
16 years 6 months ago
Hilberticus - A Tool Deciding an Elementary Sublanguage of Set Theory
We present a tool deciding a fragment of set theory. It is designed to be easily accessible via the internet and intuitively usable by anyone who is working with sets to describe a...
Jörg Lücke
CADE
2001
Springer
16 years 6 months ago
NP-Completeness of Refutability by Literal-Once Resolution
A boolean formula in conjunctive normal form (CNF) F is refuted by literal?once resolution if the empty clause is inferred from F by resolving on each literal of F at most once. Li...
Stefan Szeider
TIME
2009
IEEE
16 years 1 months ago
The AXML Artifact Model
—Towards a data-centric workflow approach, we introduce an artifact model to capture data and workflow management activities in distributed settings. The model is built on Acti...
Serge Abiteboul, Pierre Bourhis, Alban Galland, Bo...
LOPSTR
2009
Springer
16 years 1 months ago
LP with Flexible Grouping and Aggregates Using Modes
We propose a new grouping operator for logic programs based on the group_by operator of SQL. The novelty of our proposal lies in the use of modes, which allows us to relax some rat...
Marcin Czenko, Sandro Etalle