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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 06/07 529/731<br />

8. Action/Time as Modalities 1. Time: LTL, CTL<br />

Reasoning about Time: CTL<br />

Path quantifiers: A (for all paths), E (there is a path);<br />

Temporal operators: ❥ (nexttime), ♦ (sometime), □<br />

(always) and U (until);<br />

“Vanilla” CTL: every temporal operator must be<br />

immediately preceded by exactly one path quantifier;<br />

CTL*: no syntactic restrictions;<br />

Reasoning in “vanilla” CTL can be automatized.

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