27.01.2014 Views

Multiagent Systems

Multiagent Systems

Multiagent Systems

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Prof. Dr. Jürgen Dix · Department of Informatics, TUC <strong>Multiagent</strong> <strong>Systems</strong>, WS 06/07 199/731<br />

3. Decision Making (1) 2. Non-coop Games<br />

Definition 3.12 (Mixed Strategy for NF Games)<br />

Let 〈N, A, O, ϱ, u〉 be normal form game. For a set X let<br />

Π(X) be the set of all probability distributions over X.<br />

The set of mixed strategies for player i is the set<br />

S i = Π(A i ). The set of mixed strategy profiles is<br />

S 1 × . . . × S n .<br />

The support of a mixed strategy is the set of actions that<br />

are assigned non-zero probabilities.<br />

What is the payoff of such strategies? We have to take into<br />

account the probability with which an action is chosen.<br />

This leads to the expected utility µ expected .

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!