Ag.algebraic geometry – locally affine varieties and du val singularities

Let me begin with an apologetic clue: I am very far from an algebraic geometer, so this question might be roughly worded.

I have a specific question about the singularities of du Val, but when trying to gather information online, I also came across a more general question. In everything below, I assume that I am revising $ mathbb {C} $,

general question

A smooth variety / (reduced, separate, finite, etc.) scheme contains an atlas of open affines. The variety is called uniformly rational if it permits an atlas of open affines, each of which itself is an open subset of affine space of Zariski $ mathbb {A} ^ d $,

An even stronger condition to ask for is an atlas in which every open affine is actually a copy of $ mathbb {A} ^ d $ itself. In other words, the variety should be locally isomorphic to affine the space. Obvious examples are, for example, the projective space itself and the entire space of line bundles over the projective space.

My general question is whether this variety class has a name or is known to be so restrictive that it is completely uninteresting (I realize that the requirement of rationality of the variety is already very restrictive).

Specific question

A slightly more interesting class of examples that can be considered locally affine in the above sense are the minimal resolutions of $ A $-type du val singularities. The puffing up of the singularity provides just such an atlas of $ mathbb {A} ^ 2 $ Stains.

It seems to me that the same applies to (minimal resolutions of) the $ D $Type (and possibly $ E $-type) singularities, even if this is not automatically provided by inflating the textbook to achieve the minimum resolutions.

My specific question is whether such an atlas for resolutions of du-val singularities is a standard issue or whether this claim is somehow obvious (or alternatively, if the claim is obviously false and indicates a mistake on my part).

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Davidbendy
Reviewed by Davidbendy on
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Rating: 5

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SQL Server 2012 – dtexec / val / proj my.ispac / pack my.dtsx / rep v will be returned immediately without any messages

I'm trying to set up a command call to dtexec to check packages using the project model. I call dtexec like this:

dtexec / val / proj my.ispac / pack my.dtsx / rep v 

The real paths to ispac and dtsx, however, are longer. When I do this, I only see on the console:

Microsoft (R) SQL Server utility for executing packages
Version 11.0.7001.0 for 32-bit
Copyright (C) 2016 Microsoft. All rights reserved.

Started at 10:40:01
PS D: >

The whole thing runs under a second, which makes me believe that it has done nothing. There are no messages, although I asked for detailed reporting.

Any ideas how that works?