First steps towards total reality of meromorphic functions

Details First steps towards total reality of meromorphic functions First steps towards total reality of meromorphic functions

2006-05-02

arxiv.org/abs/math/0605075v1

Mathematics

Algebraic Geometry

10 pages, 1 figure

Scientific paper

It was earlier conjectured by the second and the third authors that any rational curve $g:{\mathbb C}P^1\to {\mathbb C}P^n$ such that the inverse images of all its flattening points lie on the real line ${\mathbb R}P^1\subset {\mathbb C}P^1$ is real algebraic up to a linear fractional transformation of the image ${\mathbb C}P^n$. (By a flattening point $p$ on $g$ we mean a point at which the Frenet $n$-frame $(g',g'',...,g^{(n)})$ is degenerate.) Below we extend this conjecture to the case of meromorphic functions on real algebraic curves of higher genera and settle it for meromorphic functions of degrees $2,3$ and several other cases.

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