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- W2066918406 abstract "Given a normal surface singularity (X,Q) and a birational morphism to a non-singular surface π:X→S, we investigate the local geometry of the exceptional divisor L of π. We prove that the dimension of the tangent space to L at Q equals the number of exceptional components meeting at Q. Consequences relative to the existence of such birational projections contracting a prescribed number of irreducible curves are deduced. A new characterisation of minimal singularities is obtained in these terms." @default.
- W2066918406 created "2016-06-24" @default.
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- W2066918406 date "2009-05-01" @default.
- W2066918406 modified "2023-09-26" @default.
- W2066918406 title "On the exceptional locus of the birational projections of a normal surface singularity into a plane" @default.
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- W2066918406 doi "https://doi.org/10.1016/j.jalgebra.2009.02.006" @default.
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