Algebraically constructible functions
classification
alg-geom
math.AG
keywords
algebraicconstructiblefunctionspropertiesakbulutalgebraicallycalculusconditions
read the original abstract
An algebraic version of Kashiwara and Schapira's calculus of constructible functions is used to describe local topological properties of real algebraic sets, including Akbulut and King's numerical conditions for a stratified set of dimension three to be algebraic. These properties, which include generalizations of the invariants modulo 4, 8, and 16 of Coste and Kurdyka, are defined using the link operator on the ring of constructible functions.
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