Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-19T07:40:20.397Z Has data issue: false hasContentIssue false

Stable mappings of discriminant varieties

Published online by Cambridge University Press:  24 October 2008

J. W. Bruce
Affiliation:
Department of Mathematics, University of Newcastle upon Tyne

Extract

Smooth mappings defined on discriminant varieties of -versal unfoldings of isolated singularities arise in many interesting geometrical contexts, for example when classifying outlines of smooth surfaces in ℝ3 and their duals, or wave-front evolution [1, 2, 5]. In three previous papers we have classified various stable mappings on discriminants. When the isolated singularity is weighted homogeneous the discriminant is not a local smooth product, and this makes the classification of stable germs considerably easier than in general. Moreover, discriminants arising from weighted homogeneous singularities predominate in low dimensions, so such classifications are very useful for applications.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Arnol'd, V. I.. Wavefront evolution and equivariant Morse lemma. Comm. Pure Appl. Math. 29 (1976), 557582.CrossRefGoogle Scholar
[2]Arnol'd, V. I.. Indices of singular points of 1-forms on a manifold with boundary, convolution of invariants of relection groups, and singular projections of smooth surfaces. Russian Math. Surveys 34, 2 (1979), 142.CrossRefGoogle Scholar
[3]Arnol'd, V. I.. Local normal forms of functions. Invent. Math. 35 (1976), 87109.CrossRefGoogle Scholar
[4]Arnol'd, V. I., Gusein-Zade, S. M. and Varchenko, A. N.. Singularities of differentiable maps, vol. 1 (Birkhauser, 1985).CrossRefGoogle Scholar
[5]Bruce, J. W. and Giblin, P. J.. Smooth stable maps of discriminant varieties. Proc. London Math. Soc. (3) 50 (1985), 535551.CrossRefGoogle Scholar
[6]Bruce, J. W.. Functions on discriminants. J. London Math. Soc. 30 (1985), 551567.Google Scholar
[7]Bruce, J. W.. Stability of the projection of the discriminant set to the bifurcation set with applications. Bull. London Math. Soc. 18 (1986), 299305.CrossRefGoogle Scholar
[8]Bruce, J. W. and Roberts, R. M.. Critical points of functions on analytic varieties. To appear in Topology.Google Scholar
[9]Bruce, J. W.. Vector fields on discriminants and bifurcation varieties. Bull. London Math. Soc. 17 (1985), 257262.CrossRefGoogle Scholar
[10]Damon, J. N.. The unfolding and determinacy theorems for subgroups of and . In Singularities, Proceedings of Symposia in Pure Mathematics, vol. 40, 1 (American Mathematical Society, 1983), pp. 233254.CrossRefGoogle Scholar
[11]Looijenga, E. J. N.. Isolated singular points of complete intersections, London Math. Soc. Lecture Note Series 77 (Cambridge University Press, 1984).CrossRefGoogle Scholar
[12]Martinet, J.. Singularities of smooth functions and maps, London Math. Soc. Lecture Note Series 58 (Cambridge University Press, 1982).Google Scholar
[13]Saito, K.. Primitive forms for a universal unfolding of a function with an isolated critical point. J. Fac. Sci. Univ. Tokyo Sect. 1A, 28 (1982), 775792.Google Scholar
[14]Teissier, B.. The hunting of invariants in the geometry of discriminants. In Real and complex singularities, Oslo 1976 (ed. Holm, P.) (Sijthoff and Noodhoff, 1976), 565677.Google Scholar
[15]Terao, H.. Discriminant of a holomorphic map and logarithmic vector fields. J. Fac. Sci. Univ. Tokyo Sect. 1 A, 30 (1983), 379391.Google Scholar
[16]Wall, C. T. C.. Finite determinacy of smooth map-germs. Bull. London Math. Soc. 13 (1981), 481539.CrossRefGoogle Scholar
[17]Zakalyukin, V. M.. Reconstructions of wave fronts depending on one parameter (Russian), Funktsional. Anal. i Prilozhen. 10 (1976), 6970Google Scholar
English translation, Funct. Anal. Appl. 10 (1976), 139140.CrossRefGoogle Scholar
[18]Zakalyukin, V. M.. Legendre mappings in Hamiltonian systems (Russian). In Some problems of mechanics (MoscowAviation Inst., 1979), pp. 1115.Google Scholar