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Multiagent Systems

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Prof. Dr. Jürgen Dix · Department of Informatics, TUC <strong>Multiagent</strong> <strong>Systems</strong>, WS 06/07 636/731<br />

9. Agents based on FOL 3. Successor State Axioms<br />

Actions have preconditions: necessary and sufficient<br />

conditions which must hold before an action can be<br />

executed.<br />

A robot r can lift object x in situation s iff r is not<br />

holding anything, is located next to x, and x is not<br />

too heavy.<br />

The effect on Broken when r drops an object (positive<br />

effect axiom):<br />

Poss(drop(r, x), s) ∧ F ragile(x) →<br />

Broken(x, do(drop(r, x), s)).<br />

Repairing an object causes the object not to be broken<br />

any more (negative effect axiom):<br />

Poss(repair(r, x), s) → ¬Broken(x, do(repair(r, x), s)).

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