Multicusps

Details Multicusps Multicusps

2011-12-09

arxiv.org/abs/1112.2099v1

Mathematics

Differential Geometry

7 pages. To appear in "Proceedings of the 11th international workshop on Real and Complex Singularities", Edited by V. Goryuno

Scientific paper

For a given multicusp $f=c_{(\theta_0,..., \theta_i)}$ $(1\le i)$, we present a direct sum decomposition theorem of the source space of ${}_i\bar{\omega}f$, where ${}_i\bar{\omega}f$ is a higher version of the reduced Kodaira-Spencer-Mather map $\bar{\omega}f$. As a corollary of our direct sum decomposition theorem, we show that for any $i\in \mathbb{N}$ and any $f=c_{(\theta_0,..., \theta_i)}$, ${}_i\bar{\omega}f$ is bijective. The corollary is an affirmative answer to the question raised by M. A. S. Ruas during the 11th International Workshop on Real and Complex Singularities at the University of S${\tilde {\rm a}}$o Paulo in S${\tilde {\rm a}}$o Carlos (2010).

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