Component-count conjecture for positive definite X9X_9 singularities

Let f0f_0 be a real function singularity of type +X9+X_9, and let a versal deformation of f0f_0 have discriminant variety in its parameter space. The virtual morsifications of f0f_0 are grouped into seven virtual components.

+X9+X_9 component conjecture. Each of the seven virtual components is represented by exactly one connected component of the complement of the discriminant variety of any versal deformation of +X9+X_9.

The preceding proposition establishes the seven virtual components and their total number of virtual morsifications. The conjecture asserts that no two virtual components are realized in the same discriminant-complement component and that all seven are realized.

Sources & referencesView supporting material

Primary source

V. A. Vassiliev, “Complements of discriminants of real parabolic function singularities”, arXiv:2208.10929 (2023).

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