Finite determination conjecture for Mather–Jacobian minimal log discrepancies

Let XX be a variety of dimension dd, let xx be a closed point of XX, and define

sm(X,x)=(m+1)ddimXm(x),s_m(X,x)=(m+1)d-\dim X_m(x),

where Xm(x)X_m(x) is the local mm-jet scheme of XX at xx. Finite determination conjecture. For every positive integer dd, there exists NdNN_d\in {\mathbb N} depending only on dd such that, for every closed point xXx\in X of any dd-dimensional variety XX, there exists mNdm\leq N_d satisfying either

sm(X,x)=mldMJ(x;X)0,s_m(X,x)={\mathrm{mld_{MJ}}}(x;X)\geq 0,

or

sm(X,x)<0when mldMJ(x;X)=.s_m(X,x)<0\quad\text{when }{\mathrm{mld_{MJ}}}(x;X)=-\infty.

The conjecture would give a uniform finite bound for detecting Mather–Jacobian minimal log discrepancies through local jet schemes; its status is unresolved in the source.

Sources & referencesView supporting material

Primary source

Shihoko Ishii, “Finite determination conjecture for Mather-Jacobian minimal log discrepancies and its applications”, arXiv:1703.08500 (2018).

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