Equivalence conjecture for weighted homogeneous hypersurface germs and vector fields

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Let f∈O(Cn+1,0)f\in\mathcal{O}_{(\mathbb{C}^{n+1},0)} define the isolated hypersurface germ (V,0)={f=0}(V,0)=\{f=0\}, and let LVL_V be its link. A vector field on (V,0)(V,0) is transversal to the link if it is everywhere transversal to LVL_V. A vector field has a non-degenerate isolated singularity at 00 when it extends to a neighborhood of 00 in the ambient space and has a non-degenerate isolated singularity there.

Equivalence conjecture. The following statements are equivalent:

  • (V,0)(V,0) is a weighted homogeneous germ.
  • There exists a holomorphic vector field on (V,0)(V,0) that is everywhere transversal to the link LVL_V.
  • There exists a holomorphic vector field that extends to a neighborhood of the origin in the ambient space with a non-degenerate isolated singularity at 00.

The conjecture characterizes weighted homogeneity through the existence of suitable holomorphic vector fields. The source states that it is proved in part; the remaining implications or cases are not resolved in the supplied text.

References

Primary source

Diogo da Silva Machado and Jose Seade, “Generic vector fields on isolated complex hypersurface germs”, arXiv:2605.09210 (2026).

Additional references

4 papers in this index state this conjecture (2017–2026). The statement above is taken from the most recent of them; the others are arXiv:2408.00369, arXiv:1807.03665, arXiv:1706.09048.

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