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Prof. Dr. Jürgen Dix · Department of Informatics, TUC <strong>Multiagent</strong> <strong>Systems</strong>, WS 06/07 453/731<br />

6. Propositional Logic 4. Calculi for SL<br />

Although the axioms from above and modus ponens<br />

suffice it is reasonable to consider more general systems.<br />

Therefore we introduce the following term:<br />

Definition 6.15 (Rule System MP + D)<br />

Let D be a set of general inference rules, e.g. mappings,<br />

which assign a formula ψ to a finite set of formulae<br />

ϕ 1 , ϕ 2 , . . . , ϕ n . We write<br />

ϕ 1 , ϕ 2 , . . . , ϕ n<br />

.<br />

ψ<br />

MP + D is the rule systems which emerges from adding<br />

the rules in D to modus ponens. For W ⊆ F ml be<br />

Cn D (W )<br />

in the following the set of all formulae ϕ, which can be<br />

derived from W and the inference rules from MP+D.

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