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Apr 11, 2021 at 12:16 comment added Kovalevskaia By a crepant resolution in codimension 2, I mean a sujective morphism $r:X\rightarrow \mathbb{C}^4/G$ such that $X$ has only isolated singularities, $X$ has a trivial canonical bundle and the restriction $r^{-1}(\mathbb{C}^4/G\smallsetminus\Sigma)\rightarrow \mathbb{C}^4/G\smallsetminus\Sigma$ is an isomorphism, where $\Sigma$ is the surface of singularities in $\mathbb{C}^4/G$.
Apr 11, 2021 at 11:59 history asked Kovalevskaia CC BY-SA 4.0