Contractible stable perturbation conjecture for finitely determined germs

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Let f:(Cn,0)→(Cp,0)f:(\mathbb{C}^n,0)\to(\mathbb{C}^p,0) be an unstable A\mathscr{A}-finite germ with n<pn<p, and let fsf_s be a stable perturbation. Write im⁡fs\operatorname{im} f_s for the image of the stable perturbation, and let Z+\mathbb{Z}^+ denote the positive integers.

Contractible stable perturbation conjecture. There are such germs for which

im⁡fs≃{∗}\operatorname{im} f_s\simeq\left\{*\right\}

if and only if

pp−n∉Z+.\frac{p}{p-n}\notin\mathbb{Z}^+.

This conjecture proposes a dimension-theoretic characterization of when unstable finitely determined germs can have contractible stable perturbation images. Its resolution status is not specified in the source excerpt.

References

Primary source

R. Giménez Conejero, “Isotypical components of the homology of ICIS and images of deformations of map germs”, arXiv:2207.05196 (2025).

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