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We consider argumentation systems taking into account several attack relations of different strength. We focus on the impact of various strength attacks on the semantics of such systems, and particularly on the decision problem of credulous acceptance: namely, focussing on one particular argument, a classical issue is to compute a proof, under the form of an admissible set containing this argument...
The existence of powerful constraint satisfaction algorithms is not the sole reason of the wide success of the CSP framework. The interest of this framework is also that it offers a generic and simple way for the modeling of real world applications. Nevertheless these applications call for tasks that often differ from a classical search for a solution. The aim of the present paper is not to provide...
In the domain of classical planning one distinguishes plans which are optimal in their number of actions, they are referred as sequential plans, from plans which are optimal in their number of levels, they are referred as parallel plans. Searching optimal sequential plans is generally considered harder than searching optimal parallel plans. Buttner and Rintanen have proposed a search procedure which...
The article discusses formal aspects of the notion of context as needed in AI applications. We advocate the use of Martin-Löf's intuitionistic type theory to formalize and implement contexts. Through many examples belonging to the domains of computational semantics and knowledge based systems, we show that the built-in notion of context in intuitionistic type theory is a structure rich enough for...
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