Order of Magnitude Reasoning in Qualitative Differential Equations

Research output: Chapter in Book/Report/Conference proceedingChapter


We present a theory that combines order of magnitude reasoning with envisionment of qualitative differential equations. Such a theory can be used to reason qualitatively about dynamical systems containing parameters of widely varying magnitudes. We present an a mathematical analysis of envisionment over orders of magnitude, including a complete categorization of adjacent pairs of qualitative states. We show how this theory can be applied to simple problems, we give an algorithm for generating a complete envisionment graph, and we discuss the implementation of this algorithm in a running program.

Original languageEnglish (US)
Title of host publicationReadings in Qualitative Reasoning About Physical Systems
PublisherElsevier Inc.
Number of pages13
ISBN (Print)1558600957, 9781483214474
StatePublished - Sep 17 2013

ASJC Scopus subject areas

  • General Computer Science


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