Embedded resolution of singularities for quasi-excellent regular schemes

Let XZX\subset Z be a reduced closed subscheme of a quasi-excellent regular Noetherian scheme ZZ. Write XX' for the strict transform of XX under a proper birational morphism π:ZZ\pi:Z'\to Z, and write Sing(X)\operatorname{Sing}(X) for the singular locus of XX. Embedded resolution of singularities. There exist a regular scheme ZZ' and a proper, birational morphism π:ZZ\pi:Z'\to Z such that

XZ is regular,π1(ZSing(X))ZSing(X),π1(Sing(X))red is a simple normal crossing divisor, \begin{gathered} X'\subset Z'\text{ is regular},\\ \pi^{-1}(Z\setminus\operatorname{Sing}(X))\cong Z\setminus\operatorname{Sing}(X),\\ \pi^{-1}(\operatorname{Sing}(X))_{\mathrm{red}}\text{ is a simple normal crossing divisor,}\ \end{gathered}

where each irreducible component of the divisor is regular, its components intersect transversally, and it intersects XX' transversally. Thus the singularities of XX admit an embedded resolution by a proper birational modification that is an isomorphism away from the singular locus. The statement is presented as the characteristic-zero-style resolution goal for classes of singularities in general, including positive or mixed characteristic; the supplied context does not establish whether it is known or remains open in the stated generality.

Sources & referencesView supporting material

Primary source

Bernd Schober, “Partial local resolution by characteristic zero methods”, arXiv:1708.04784 (2018).

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