Abstract
The rank of the first differential f x determines the singularity classes Σi. Consideration of the quadratic part of the map gives a more precise classification: we associate to each singularity a family of quadratic forms invariantly associated with it.
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© 1985 Birkhäuser Boston, Inc.
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Arnold, V.I., Gusein-Zade, S.M., Varchenko, A.N. (1985). The quadratic differential of a map. In: Singularities of Differentiable Maps. Monographs in Mathematics, vol 82. Birkhäuser Boston. https://doi.org/10.1007/978-1-4612-5154-5_3
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DOI: https://doi.org/10.1007/978-1-4612-5154-5_3
Publisher Name: Birkhäuser Boston
Print ISBN: 978-1-4612-9589-1
Online ISBN: 978-1-4612-5154-5
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