Tim Geisler

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Satchmo is an automated theorem prover for rst-order predicate logic. Its reasoning paradigm, model generation, is more powerful than the traditional refutation paradigm. Satchmo can be seen as an inference engine for expert systems capable of handling not only constructive and deenite speciications, but also normative and indeenite ones. The implementation(More)
We present a collection of simple but powerful techniques for enhancing the eeciency of tableau-based model generators such as Satchmo. The central ideas are to compile a clausal rst order theory into a procedural Prolog program and to avoid redundant work of a na ve implementation. We have compared various combinations of our techniques among each other(More)
Reason maintenance systems and temporal reasoning systems are among the most prominent application-independent support systems used for complex AI applications and there are many applications that need both support for logical and temporal reasoning. Apparently it is not enough to just provide two isolated support modules. The logical and temporal(More)
Automated reasoning is becoming an essential issue in many Web systems and applications, especially in emerging Semantic Web applications. This article first discusses reasons for this evolution. Then, it presents research issues currently investigated towards automated reasoning on the Web and it introduces into selected applications demonstrating the(More)
rend possible une technique nouvelle et performante de g en eration de mod eles de Herbrand minimaux qui evite la construction de mod eles non-minimaux qui devrait ^ etre elimin es dans une phase ult erieure. Il favorise egalement le d evelopement de plusieurs techniques avanc ees d'optimisation qui permettent des performances tr es comp etitives sur les(More)