On Huisman's conjectures about unramified real curves
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Contributors
Abstract
Let X Pn be an unramified real curve with X(R) ≠ 0. If n ≥ 3 is odd, Huisman [9] conjectured that X is an M-curve and that every branch of X(R) is a pseudo-line. If n ≥ 4 is even, he conjectures that X is a rational normal curve or a twisted form of such a curve. Recently, a family of unramified M-curves in P3 providing counterexamples to the first conjecture was constructed in [11]. In this note we construct another family of counterexamples that are not even M-curves. We remark that the second conjecture follows for generic curves of odd degree from the de Jonquières formula.
Details
Original language | English |
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Pages (from-to) | 545-549 |
Number of pages | 5 |
Journal | Advances in geometry |
Volume | 21 |
Issue number | 4 |
Publication status | Published - 1 Oct 2021 |
Peer-reviewed | Yes |
External IDs
Scopus | 85117941762 |
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Keywords
ASJC Scopus subject areas
Keywords
- Real algebraic curve, M-curve, ramification