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Multiagent Systems

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of. Dr. Jürgen Dix · Department of Informatics, TUC <strong>Multiagent</strong> <strong>Systems</strong>, WS 06/07 354/731<br />

5. Nets and coalitions 2. Four Types of Nets<br />

Proof.<br />

Consider O contracts (as fourth type). One task<br />

and 2 agents: T 1 = {t 1 }, T 2 = ∅.<br />

c 1 (∅) = 0, c 1 ({t 1 }) = 2, c 2 (∅) = 0, c 2 ({t 1 }) = 1. The<br />

O contract of moving t 1 would decrease global<br />

cost by 1. No C-, S-, or M-contract is possible.<br />

To show the same for C or S contracts, two<br />

agents and two tasks suffice.<br />

For M-contracts 3 agents and 3 tasks are<br />

needed.

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