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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 06/07 605/731<br />

9. Agents based on FOL 1. First Order Logic (FOL)<br />

Definition 9.5 (Semantics of first order logic)<br />

ϕ be a formula, A a structure matching with ϕ and ϱ a<br />

variable assignment over A. For each term t, which can be<br />

built from components of ϕ, we define inductively the<br />

value of t in the structure A, we call A(t).<br />

1 for a variable x is A(x) = def ϱ(x).<br />

2 if t has the form t = f k (t 1 , . . . , t k ), with t 1 , . . . , t k being<br />

terms and f k a k-dimensional function symbol, then<br />

A(t) = def f A (A(t 1 ), . . . , A(t k )).

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