Self intersections of wavefront evolution

J.W. Bruce

    Research output: Contribution to journalArticle (journal)peer-review


    In this paper we generalise results of V. I. Arnold on functions defined on discriminant sets of simple singularities to the case where we have a transverse intersection of such sets. This generalization is very easy, but the results are of some geometric importance since they describe (amongst other things) the quasi global behaviour of wavefront evolution that is the changes in the self intersections of the wavefronts as time progresses. We first prove the required generalisation and then discuss how to proceed when considering functions on the transverse intersection of bifurcation sets. Familiarity with the results and notation of Arnold's paper (1976, Wavefront evolution and equivariant Morse lemma, "Commun. pure appl. Math." 29, 557-82) is assumed.
    Original languageEnglish
    Pages (from-to)225-229
    JournalProceedings of the Royal Irish Academy. Section A: Mathematical and Physical Sciences
    Issue number2
    Publication statusPublished - 1983


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