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Universal polynomials for singular curves on surfaces

Published online by Cambridge University Press:  06 June 2014

Jun Li
Affiliation:
Department of Mathematics, Stanford University, California, CA 94305, USA email jli@math.stanford.edu
Yu-jong Tzeng
Affiliation:
Department of Mathematics, Harvard University, Cambridge, MA 02138, USA email ytzeng@math.harvard.edu
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Abstract

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Let $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}S$ be a complex smooth projective surface and $L$ be a line bundle on $S$. For any given collection of isolated topological or analytic singularity types, we show the number of curves in the linear system $|L|$ with prescribed singularities is a universal polynomial of Chern numbers of $L$ and $S$, assuming $L$ is sufficiently ample. More generally, we show for vector bundles of any rank and smooth varieties of any dimension, similar universal polynomials also exist and equal the number of singular subvarieties cutting out by sections of the vector bundle. This work is a generalization of Göttsche’s conjecture.

Information

Type
Research Article
Copyright
© The Author(s) 2014