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Non-special divisors on real algebraic curves and embeddings into real projective spaces. (English) Zbl 1072.14072

It is proved that on a given real algebraic curve \(X\) there is a large class of non-special divisors of relatively small degree, and if \(X\) has many real components, such a divisor determines an embedding of \(X\) into the real projective space \(\mathbb{P}^r\) for \(r\geq 3\) (and a birational embedding for \(r=2\)). These embeddings are then studied in detail.

MSC:

14P05 Real algebraic sets
14C20 Divisors, linear systems, invertible sheaves
14H50 Plane and space curves
14P25 Topology of real algebraic varieties
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