Contractible stable perturbation conjecture for finitely determined germs

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 imfs\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

imfs{}\operatorname{im} f_s\simeq\left\{*\right\}

if and only if

ppnZ+.\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.

Sources & referencesView supporting material

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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