Abstract

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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Additional Information

ISSN
1080-6377
Print ISSN
0002-9327
Pages
pp. 171-193
Launched on MUSE
2009-01-30
Open Access
No
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