Multiplicity and embedding-dimension boundedness conjecture

Let nn be a positive integer, let ε>0\varepsilon>0, and let multxX\operatorname{mult}_xX denote the multiplicity and the embedded dimension of xXx\in X its embedding dimension. Multiplicity and embedding-dimension boundedness conjecture. There exists a constant M=M(n,ε)M=M(n,\varepsilon) such that every nn-dimensional klt singularity xXx\in X with

vol^(x,X)ε\widehat{\rm vol}(x,X)\geq\varepsilon

has

multxXM\operatorname{mult}_xX\leq M

and embedded dimension at most MM. This is described as a consequence expected from the Boundedness Conjecture, because these invariants are bounded in bounded families and non-decreasing under specialization; no resolution is stated.

Sources & referencesView supporting material

Primary source

Ziquan Zhuang, “Stability of klt singularities”, arXiv:2307.10525 (2023).

Additional references

2 papers in this index state this conjecture (2002–2023). The statement above is taken from the most recent of them; the others are arXiv:math/0212107.

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