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arXiv · 1404.7463

The Thom Conjecture for proper polynomial mappings

Zbigniew Jelonek
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Abstract

Let $f,g:X \to Y$ be continuous mappings. We say that $f$ is topologically equivalent to $g$ if there exist homeomorphisms $Φ: X\to X$ and $Ψ: Y\to Y$ such that $Ψ\circ f\circ Φ=g.$ Let $X,Y$ be complex smooth irreducible affine varieties. We show that every algebraic family $F: M\times X\ni (m, x)\mapsto F(m, x)=f_m(x)\in Y$ of polynomial mappings contains only a finite number of topologically non-equivalent proper mappings. In particular there are only a finite number of topologically non-equivalent proper polynomial mappings $f: \Bbb C^n\to\Bbb C^m$ of bounded (algebraic) degree. This gives a positive answer to the Thom Conjecture in the case of proper polynomial mappings.

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Zbigniew Jelonek. 2015-02-08. The Thom Conjecture for proper polynomial mappings. https://arxiv.org/abs/1404.7463

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