Homological Zariski Problem B for initial forms

Let f,g ⁣:(Cn,0)(C,0)f,g\colon(\mathbb{C}^n,0)\to(\mathbb{C},0) be reduced holomorphic function-germs, and let ff_* and gg_* be their initial forms. Suppose there is a homeomorphism φ ⁣:(Cn,0)(Cn,0)\varphi\colon(\mathbb{C}^n,0)\to(\mathbb{C}^n,0) such that f=gφf=g\circ\varphi. Homological Zariski Problem B conjecture. The spaces f1(0){0}f_*^{-1}(0)\setminus\{0\} and g1(0){0}g_*^{-1}(0)\setminus\{0\} should have the same homology. This is stated as a weaker form of Zariski's Problem B; the paper notes that a positive answer would imply the right-equivalence version of Zariski's multiplicity conjecture, but gives no general resolution.

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Primary source

José Edson Sampaio, “On the Milnor fibres of initial forms of topologically equivalent holomorphic functions”, arXiv:2503.17127 (2025).

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