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On Huisman's conjectures about unramified real curves

Authors :
Dimitri Manevich
Mario Kummer
Publication Year :
2019
Publisher :
arXiv, 2019.

Abstract

Let $X \subset \mathbb{P}^{n}$ be an unramified real curve with $X(\mathbb{R}) \neq \emptyset$. If $n \geq 3$ is odd, Huisman conjectures that $X$ is an $M$-curve and that every branch of $X(\mathbb{R})$ is a pseudo-line. If $n \geq 4$ is even, he conjectures that $X$ is a rational normal curve or a twisted form of a such. We disprove the first conjecture by giving a family of counterexamples. We remark that the second conjecture follows for generic curves of odd degree from the formula enumerating the number of complex inflection points.<br />Comment: 9 pages, 2 figures

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....4ab1d73c4e0cc3988f5679b3e1090598
Full Text :
https://doi.org/10.48550/arxiv.1909.09601