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ℚ-Gorenstein deformations of nonnormal surfaces
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Let $\Delta \subset H$ be the germ of a nonnormal surface along a proper curve
with smooth components such that the high index points of $H$ are
semi-log-terminal and the Gorenstein singular points are semi-log-canonical of
embedding dimension at most 4. We describe the sheaf $T^1_{qG}(H)$ of ${\Bbb
Q}$-Gorenstein deformations of $H$ and we obtain criteria for $\Delta\subset H$
to have ${\Bbb Q}$-Gorenstein terminal smoothings.
Title: ℚ-Gorenstein deformations of nonnormal surfaces
Description:
Let $\Delta \subset H$ be the germ of a nonnormal surface along a proper curve
with smooth components such that the high index points of $H$ are
semi-log-terminal and the Gorenstein singular points are semi-log-canonical of
embedding dimension at most 4.
We describe the sheaf $T^1_{qG}(H)$ of ${\Bbb
Q}$-Gorenstein deformations of $H$ and we obtain criteria for $\Delta\subset H$
to have ${\Bbb Q}$-Gorenstein terminal smoothings.
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