[PDF][PDF] Decision lists over regular patterns

S Lange, J Nessel�- Theoretical computer science, 2003 - core.ac.uk
S Lange, J Nessel
Theoretical computer science, 2003core.ac.uk
The paper introduces the notion of decision lists over regular patterns. This formalism
provides a strict extension of regular erasing pattern languages and of containment decision
lists. Formal properties of the resulting language class, a subclass of the regular languages,
are investigated. In particular, we show that decision lists over regular patterns have exactly
the same expressive power as decision trees over regular patterns. Moreover, we study the
learnability of the resulting language class within different formal settings including Gold's�…
Abstract
The paper introduces the notion of decision lists over regular patterns. This formalism provides a strict extension of regular erasing pattern languages and of containment decision lists. Formal properties of the resulting language class, a subclass of the regular languages, are investigated. In particular, we show that decision lists over regular patterns have exactly the same expressive power as decision trees over regular patterns. Moreover, we study the learnability of the resulting language class within different formal settings including Gold’s model of learning in the limit as well as Valiant’s model of approximately correct learning. cO 2002 Elsevier Science BV All rights reserved.
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