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A. Pascal
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I'm interested in having especially simple embedded resolutions of a closed subscheme $Z \subset \mathbb{A}^{n}$ in characteristic zero.

Hironaka gives the existence of a smooth variety $M$ and a proper map $p: M \rightarrow \mathbb{A}^{n}$ that is an isomorphism away from $D=p^{-1}(Z)$ and $D$ has simple normal crossings.

I would like to be able to assume that the intersection of any two irreducible components of $D$ is either empty or connected. If two irreducible components did have disconnected intersection, at least whenthen perhaps this could be achieved by blowing up $n={\rm dim} M >2$$M$ along the connected components of the intersection.

Is this too much to ask for?

I'm interested in having especially simple embedded resolutions of a closed subscheme $Z \subset \mathbb{A}^{n}$ in characteristic zero.

Hironaka gives the existence of a smooth variety $M$ and a proper map $p: M \rightarrow \mathbb{A}^{n}$ that is an isomorphism away from $D=p^{-1}(Z)$ and $D$ has simple normal crossings.

I would like to be able to assume that the intersection of two irreducible components of $D$ is either empty or connected, at least when $n={\rm dim} M >2$.

Is this too much to ask for?

I'm interested in having especially simple embedded resolutions of a closed subscheme $Z \subset \mathbb{A}^{n}$ in characteristic zero.

Hironaka gives the existence of a smooth variety $M$ and a proper map $p: M \rightarrow \mathbb{A}^{n}$ that is an isomorphism away from $D=p^{-1}(Z)$ and $D$ has simple normal crossings.

I would like to be able to assume that the intersection of any two irreducible components of $D$ is either empty or connected. If two irreducible components did have disconnected intersection, then perhaps this could be achieved by blowing up $M$ along the connected components of the intersection.

Is this too much to ask for?

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A. Pascal
  • 1.3k
  • 1
  • 10
  • 20

Simple normal crossings divisor with connected intersections

I'm interested in having especially simple embedded resolutions of a closed subscheme $Z \subset \mathbb{A}^{n}$ in characteristic zero.

Hironaka gives the existence of a smooth variety $M$ and a proper map $p: M \rightarrow \mathbb{A}^{n}$ that is an isomorphism away from $D=p^{-1}(Z)$ and $D$ has simple normal crossings.

I would like to be able to assume that the intersection of two irreducible components of $D$ is either empty or connected, at least when $n={\rm dim} M >2$.

Is this too much to ask for?