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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 06/07 309/731<br />

4. Decision Making (2) 2. Tactical Voting<br />

Here are two examples for social correspondences.<br />

1 Let W ∗ 1 : Ord par → 2 O ;<br />

|A|<br />

⋃<br />

W ∗ 1 (〈≺ 1 , . . . , ≺ |A| 〉) := top(≺ i )<br />

i=1<br />

2 Let W ∗ 2 : Ord par → 2 O ;<br />

W ∗ 2 (〈≺ 1 , . . . , ≺ |A| 〉) := top(≺ pareto )<br />

where a≺ pareto b iff a≺ i b for all 1 ≤ i ≤ |A|, otherwise<br />

a, b are incomparable.<br />

Exercise<br />

Are these correspondences strategy-proof? Prove or give<br />

counterexamples.

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