Local Euler obstructions of toric varieties |
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Authors: | Bernt Ivar Utstøl Nødland |
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Institution: | Department of Mathematics, University of Oslo, Moltke Moes vei 35, 0851 Oslo, Norway |
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Abstract: | We use Matsui and Takeuchi's formula for toric A-discriminants to give algorithms for computing local Euler obstructions and dual degrees of toric surfaces and 3-folds. In particular, we consider weighted projective spaces. As an application we give counterexamples to a conjecture by Matsui and Takeuchi. As another application we recover the well-known fact that the only defective normal toric surfaces are cones. |
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Keywords: | Primary 14M25 secondary 52B20 14B05 14C17 |
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