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Determinacy of Smooth Germs with Real Isolated Line Singularities

Bohao Sun and Leslie C. Wilson
Proceedings of the American Mathematical Society
Vol. 129, No. 9 (Sep., 2001), pp. 2789-2797
Stable URL: http://www.jstor.org/stable/2668805
Page Count: 9
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Determinacy of Smooth Germs with Real Isolated Line Singularities
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Abstract

The germ of a smooth real-valued function on Euclidean space is called a real isolated line singularity if its singular set is a nonsingular curve, its Jacobian ideal is Łojasiewicz at the singular set, and its Hessian determinant restricted to the singular set is Łojasiewicz at 0. Consider the set of all germs whose singular set contains a fixed nonsingular curve L. We prove that such a germ f is infinitely determined among all such germs with respect to composition by diffeomorphisms preserving L if, and only if, the Jacobian ideal of f contains all germs which vanish on L and are infinitely flat at 0 if, and only if, f is a real isolated line singularity.

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