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What is Pointwise Ranking Function

Chapter 198
Encyclopedia of Artificial Intelligence
A function ? from the set of worlds W into the natural numbers N, ?: W ? N, is a pointwise ranking function on W if and only if ?(w) = 0 for at least one world w in W.
Published in Chapter:
Ranking Functions
Franz Huber (California Institute of Technology, USA)
Copyright: © 2009 |Pages: 5
DOI: 10.4018/978-1-59904-849-9.ch198
Abstract
Ranking functions have been introduced under the name of ordinal conditional functions in Spohn (1988; 1990). They are representations of epistemic states and their dynamics. The most comprehensive and up to date presentation is Spohn (manuscript).
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