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- W4297808330 abstract "The purpose of this short expository note is to provide an example exhibiting some of the pathological properties of real-analytic subvarieties, where the pathology can be visualized, and the proofs use only elementary properties of analytic functions. We construct a compact irreducible real-analytic subvariety $S$ of ${mathbb R}^3$ of pure dimension two such that 1) the only a real-analytic function is defined in a neighbourhood of $S$ and vanishing on $S$ is the zero function, 2) the singular set of $S$ is not a subvariety of $S$, nor is it contained in any one-dimensional subvariety of $S$, 3) the variety $S$ contains a proper subvariety of dimension two. The example shows how a badly behaved part of a subvariety can be hidden via a second well-behaved component to create a subvariety of a larger set. The pathology is visualized using several figures. Examples of these phenomena are known since the time of Cartan, but hard to find in the English language literature." @default.
- W4297808330 created "2022-10-01" @default.
- W4297808330 creator A5088020961 @default.
- W4297808330 date "2014-12-15" @default.
- W4297808330 modified "2023-10-18" @default.
- W4297808330 title "An example of a compact non-C-analytic real subvariety of ${mathbb R}^3$" @default.
- W4297808330 doi "https://doi.org/10.48550/arxiv.1412.4838" @default.
- W4297808330 hasPublicationYear "2014" @default.
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