3 problems

Conjecture on sectional delta invariants. The assumption $g(X)=g(Z)$ in axiom 4 can be omitted, and the inequality in axiom 5 can be replaced by an equality.

Let $(V,0)$ be a normal surface singularity in $\mathbb C^4$ that is not a complete intersection. Milnor–Tjurina conjecture in C4. … with equality if and only if $(V,0)$ is quasi-h…

Let $(V,0)$ be a non-Gorenstein surface singularity admitting a $\mathbb Q$-Gorenstein smoothing, meaning a smoothing obtained as an $r$-cyclic quotient of a smoothing of the index…