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user38276
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miniversality vs versality
I See. Thanks for the comment. I will need to study Artin's paper more closely to understand the obstruction to being etale on an open neighborhood.
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miniversality vs versality
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The difference between an étale finite group scheme and a finite group
Thank you very much. This is exactly the explanation I am looking for.
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The difference between an étale finite group scheme and a finite group
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The difference between an étale finite group scheme and a finite group
Yes, my intuition is this. However, I am not very familiar with group schemes, and I lack the reference. I want to check with the exports here.
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The difference between an étale finite group scheme and a finite group
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Are these rings Cohen Macaulay?
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Are these rings Cohen Macaulay?
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The singularity of the algebraic stack and the singularity of the coarse moduli space
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The singularity of the algebraic stack and the singularity of the coarse moduli space
Thank you very much. Especially for the detailed list of singularities on $\overline{M}_{1,2}$.
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